Olmecs

Monument 1, one of the four Olmec colossal heads at La Venta. This one is nearly 3 metres (9 ft) tall.

The Olmec were an ancient Pre-Columbian people living in the tropical lowlands of south-central Mexico, in what are roughly the modern-day states of Veracruz and Tabasco.

The Olmec flourished during Mesoamerica's Formative periodating roughly from 1400 BCE to about 400 BCE. They were the first Mesoamerican civilization and laid many of the foundations for the civilizations that followed. Among other "firsts", there is evidence that the Olmec practiced ritual bloodletting and played the Mesoamerican ballgame, hallmarks of nearly all subsequent Mesoamerican societies.

The most familiar aspect of the Olmecs is their artwork, particularly the aptly-named colossal heads. In fact, the Olmec civilization was first defined through artifacts purchased on the pre-Columbian art market in the late 19th and early 20th centuries. Olmec artworks are considered among ancient America's most striking and beautiful, and among the world's masterpieces.

Overview

The Olmec heartland where the Olmecs reigned from 1400 - 400 BCE.

The "Olmec heartland" is an archaeological term used to describe an area in the Gulf lowlands that is generally considered the birthplace of the Olmec culture. This area is characterized by swampy lowlands punctuated by low hills, ridges, and volcanoes. The Tuxtlas Mountains rise sharply in the north, along the Gulf of Mexico's Bay of Campeche. Here the Olmecs constructed permanent city-temple complexes at San Lorenzo Tenochtitlán, La Venta, Tres Zapotes, and Laguna de los Cerros. In this region, the first Mesoamerican civilization would emerge and reign from 1400–400 BCE.

Early prehistory

Main article: San Lorenzo Tenochtitlán

Olmec prehistory originated at its base within San Lorenzo Tenochtitlán, where distinctively Olmec features begin to emerge no later than 1400 BCE. The rise of civilization here was assisted by the local ecology of well-watered alluvial soil, as well as by the transportation network that the Coatzacoalcos river basin provided. This environment may be compared to that of other ancient centers of civilization: the Nile, Indus, and Yellow River valleys, and Mesopotamia. This highly productive environment encouraged a dense concentrated population which in turn triggered the rise of an elite class. It was this elite class that provided the social basis for the production of the symbolic and sophisticated luxury artifacts that define Olmec culture. Many of these luxury artifacts, such as jade, obsidian and magnetite, came from distant locations and suggest that early Olmec elites had access to an extensive trading network in Mesoamerica. The source of the most valued jade, for example, is found in the Motagua River valley in eastern Guatemala, and Olmec obsidian has been traced to sources in the Guatemala highlands, such as El Chayal and San Martín Jilotepeque, or in Puebla, distances ranging from 200 to 400 km away (120 - 250 miles away) respectively.

La Venta

Main article: La Venta

File:La Venta Stele 19.jpg

Monument 19 from La Venta is the earliest known representation of a feathered serpent in Mesoamerica.
© George & Audrey DeLange, used with permission.

The first Olmec center, San Lorenzo, was all but abandoned around 900 BCE at about the same time that La Venta rose to prominence. A wholesale destruction of many San Lorenzo monuments also occurred circa 950 BCE, which may point to an internal uprising or, less likely, an invasion. The latest thinking, however, is that environmental changes may have been responsible for this shift in Olmec centers, with certain important rivers changing course.

In any case, following the decline of San Lorenzo, La Venta became the most prominent Olmec center, lasting from 900 BCE until its abandonment around 400 BCE. La Venta sustained the Olmec cultural traditions, but with spectacular displays of power and wealth. The Great Pyramid was the largest Mesoamerican structure of its time. Even today, after 2500 years of erosion, it rises 34 meters above the naturally flat landscape. Buried deep within La Venta, lay opulent, labor-intensive "Offerings": 1000 tons of smooth serpentine blocks, large mosaic pavements, and at least 48 separate deposits of polished jade celts, pottery, figurines, and hematite mirrors.

Decline

It is not known with any clarity what caused the eventual extinction of the Olmec culture. It is known that between 400 and 350 BCE, population in the eastern half of the Olmec heartland dropped precipitously, and the area would remain sparsely inhabited until the 19th century. This depopulation was likely the result of "very serious environmental changes that rendered the region unsuited for large groups of farmers", in particular changes to the riverine environment that the Olmec depended upon for agriculture, for hunting and gathering, and for transportation. Archaeologists propose that these changes were triggered by tectonic upheavals or subsidence, or the silting up of rivers due to agricultural practices.

What ever the cause, within a few hundred years of the abandonment of the last Olmec cities, successor cultures had become firmly established. The Tres Zapotes site, on the western edge of the Olmec heartland, continued to be occupied well past 400 BCE, but without the hallmarks of the Olmec culture. This post-Olmec culture, often labeled Epi-Olmec, has features similar to those found at Izapa, some 330 miles (550 km) to the southeast.

Art

Fish Vessel, 12th–9th century BCE.
Height: 6.5 inches (16.5 cm).

The Olmec culture was first defined as an art style, and this continues to be the hallmark of the culture. Wrought in a large number of mediums – jade, clay, basalt, and greenstone among others – much Olmec art, such as the Wrestler, is surprisingly naturalistic. Other art, however, reveals fantastic anthropomorphic creatres, often highly stylized, using an iconography reflective of a religious meaning. Common motifs include downturned mouths and a cleft head, both of which are seen in representations of were-jaguars.

In addition to human and human-like subjects, Olmec artisans were adept at animal portrayals, for example, the fish vessel to the right or the bird vessel in the gallery below.

While Olmec figurines are found abundantly in sites throughout the Formative Period, it is the stone monuments such as the colossal heads that are the most recognizable feature of Olmec culture. These monuments can be divided into four classes:

• Colossal heads
• Rectangular "altars" (more likely thrones) such as Altar 5 shown below.
• Free-standing in-the-round sculpture, such as the twins from El Azuzul or San Martin Pajapan Monument 1.
• Stelae, such as La Venta Monument 19 above. The stelae form was generally introduced later than the colossal heads, altars, or free-standing sculptures. Over time stelae moved from simple representation of figures, such as Monument 19 or La Venta Stela 1, toward representations of historical events, particularly acts legitimizing rulers. This trend would culminate in post-Olmec monuments such as La Mojarra Stela 1, which combines images of rulers with script and calendar dates.

Colossal heads

The most recognized aspect of the Olmec civilization are the enormous helmeted heads. As no known pre-Columbian text explains them, these impressive monuments have been the subject of much speculation. Once theorized to be ballplayers, it is now generally accepted that these heads are portraits of rulers, perhaps dressed as ballplayers. Infused with individuality, no two heads are alike and the helmet-like headdresses are adorned with distinctive elements, suggesting to some personal or group symbols.

There have been 17 colossal heads unearthed to date.

Site	Count	Designations
San Lorenzo	10	Colossal Heads 1 through 10
La Venta	4	Monuments 1 through 4
Tres Zapotes	2	Monuments A & Q
Rancho la Cobata	1	Monument 1

The heads range in size from the Rancho La Cobata head, at 3.4 m high, to the pair at Tres Zapotes, at 1.47 m. It has been calculated that the largest heads weigh between 25 and 55 short tons (50 t)..

The heads were carved from single blocks or boulders of volcanic basalt, found in the Tuxtlas Mountains. The Tres Zapotes heads, for example, were sculpted from basalt found at the summit of Cerro el Vigía, at the western end of the Tuxtlas. The San Lorenzo and La Venta heads, on the other hand, were likely carved from the basalt of Cerro Cintepec, on the southeastern side, perhaps at the nearby Llano del Jicaro workshop, and dragged or floated to their final destination dozens of miles away. It has been estimated that moving a colossal head required the efforts of 1,500 people for three to four months.

Some of the heads, and many other monuments, have been variously mutilated, buried and disinterred, reset in new locations and/or reburied. It is known that some monuments, and at least two heads, were recycled or recarved, but it is not known whether this was simply due to the scarcity of stone or whether these actions had ritual or other connotations. It is also suspected that some mutilation had significance beyond mere destruction, but some scholars still do not rule out internal conflicts or, less likely, invasion as a factor.

The flat-faced, thick-lipped characteristics of the heads have caused some debate due to their apparent resemblance to African facial characteristics. Based on this comparison, some have insisted that the Olmecs were Africans who had emigrated to the New World. However, mainstream Mesoamerican scholars now reject this view, and offer other possible explanations for the facial features of the colossal heads – for example, that the heads were carved in this manner due to the shallow space allowed on the basalt boulders. Others note that in addition to the broad noses and thick lips, the heads have the Asian eye-fold, and that all these characteristics can still be found in modern Mesoamerican Indians. To support this, in the 1940s artist/art historian Miguel Covarrubias published a series of photos of Olmec artworks and of the faces of modern Mexican Indians with very similar facial characteristics.

Beyond the heartland

The major Formative Period (Pre-Classic Era) sites in present-day Mexico which show Olmec influences in the archaeological record.

Main article: Olmec influences on Mesoamerican cultures

Olmec-style artifacts, designs, figurines, monuments and iconography have been found in the archaeological records of sites hundreds of kilometres outside the Olmec heartland. These sites include:

• Tlatilco and Tlapacoya, major centers of the Tlatilco culture in the Valley of Mexico, where artifacts include hollow baby-face motif figurines and Olmec designs on ceramics.
• Chalcatzingo, in Valley of Morelos, which features Olmec-style monumental art and rock art with Olmec-style figures.
• Teopantecuanitlan, in Guerrero, which features Olmec-style monumental art as well as city plans with distinctive Olmec features.

Other sites showing probable Olmec influence include Takalik Abaj and La Democracia in Guatemala and Zazacatla in Morelos. The Juxtlahuaca and Oxtotitlan cave paintings feature Olmec designs and motifs.

Many theories have been advanced to account for the occurrence of Olmec influence far outside the heartland, including long-range trade by Olmec merchants, Olmec colonization of other regions, Olmec artisans travelling to other cities, conscious imitation of Olmec artistical styles by developing towns – some even suggest the prospect of Olmec military domination or that the Olmec iconography was actually developed outside the heartland.

The generally accepted, but by no means unanimous, interpretation is that the Olmec-style artifacts, in all sizes, became associated with elite status and were adopted by non-Olmec Formative Period chieftains in an effort to bolster their status.

Notable innovations

In addition to their influence with contemporaneous Mesoamerican cultures, as the first civilization in Mesoamerica, the Olmecs are credited, or speculatively credited, with many "firsts", including the bloodletting and perhaps human sacrifice, writing and epigraphy, and the invention of zero and the Mesoamerican calendar, and the Mesoamerican ballgame, as well as perhaps the compass. Some researchers, including artist and art historian Miguel Covarrubias, even postulate that the Olmecs formulated the forerunners of many of the later Mesoamerican deities.

Altar 5 from La Venta. The inert were-jaguar baby held by the central figure is seen by some as an indication of child sacrifice. In contrast, its sides show bas-reliefs of humans holding quite lively were-jaguar babies.

Bloodletting and sacrifice

There is a strong case that the Olmecs practiced bloodletting. Numerous natural and ceramic stingray spikes and maguey thorns have been found in the Olmec archaeological record.

The argument that the Olmecs instituted human sacrifice is significantly more speculative. No Olmec or Olmec-influenced sacrificial artifacts have yet been discovered and there is no Olmec or Olmec-influenced artwork that unambiguously shows sacrificial victims (similar, for example, to the danzante figures of Monte Albán) or scenes of human sacrifice (such as can be seen in the famous ballcourt mural from El Tajin).

However, at the El Manatí site, disarticulated skulls and femurs as well as complete skeletons of newborn or unborn children have been discovered amidst the other offerings, leading to speculation concerning infant sacrifice. It is not yet known, though, how the infants met their deaths. Some authors have also associated infant sacrifice with Olmec ritual art showing limp were-jaguar babies, most famously in La Venta's Altar 5 (to the left) or Las Limas figure. Any definitive answer will need to await further findings.

Writing

The Olmec may have been the first civilization in the Western Hemisphere to develop a writing system. Symbols found in 2002 and 2006 date to 650 BCE and 900 BCE respectively, preceding the oldest Zapotec writing dated to about 500 BCE.

The 2002 find at the San Andrés site shows a bird, speech scrolls, and glyphs that are similar to the later Mayan hieroglyphs.

Known as the Cascajal Block, the 2006 find from a site near San Lorenzo, shows a set of 62 symbols, 28 of which are unique, carved on a serpentine block. A large number of prominent archaeologists have hailed this find as the "earliest pre-Columbian writing". Others are skeptical because of the stone's singularity, the fact that it had been removed from any archaeological context, and because it bears no apparent resemblance to any other Mesoamerican writing system.

There are also well-documented later hieroglyphs known as "Epi-Olmec," and while there are some who believe that Epi-Olmec may represent a transitional script between an earlier Olmec writing system and Maya writing, the matter remains unsettled.

The back of Stela C from Tres Zapotes
This is the second oldest Long Count date yet discovered. The numerals 7.16.6.16.18 translate to September 3, 32 BCE (Julian). The glyphs surrounding the date are one of the few surviving examples of Epi-Olmec script.

Mesoamerican Long Count calendar and invention of the zero concept

See also: History of zero

The Long Count calendar used by many subsequent Mesoamerican civilizations, as well as the concept of zero, may have been devised by the Olmecs. Because the six artifacts with the earliest Long Count calendar dates were all discovered outside the immediate Maya homeland, it is likely that this calendar predated the Maya and was possibly the invention of the Olmecs. Indeed, three of these six artifacts were found within the Olmec heartland. But an argument against an Olmec origin is the fact that the Olmec civilization had ended by the 4th century BCE, several centuries before the earliest known Long Count date artifact.

The Long Count calendar required the use of zero as a place-holder within its vigesimal (base-20) positional numeral system. A shell glyph — — was used as a zero symbol for these Long Count dates, the second oldest of which, on Stela C at Tres Zapotes, has a date of 32 BCE. This is one of the earliest uses of the zero concept in history.

Mesoamerican ballgame

The Olmec, whose name means "rubber people" in the Nahuatl language of the Aztecs, are strong candidates for originating the Mesoamerican ballgame so prevalent among later cultures of the region and used for recreational and religious purposes. A dozen rubber balls dating to 1600 BCE or earlier have been found in El Manatí, an Olmec sacrificial bog 10 kilometres east of San Lorenzo Tenochtitlan. These balls predate the earliest ballcourt yet discovered at Paso de la Amada, circa 1400 BCE, although there is no certainty that they were used in the ballgame.

Daily life

Ethnicity and language

While the actual ethno-linguistic affiliation of the Olmec remain unknown, various hypotheses have been put forward. For example, in 1968 Michael D. Coe speculated that the Olmec were Mayan.

In 1976 linguists Lyle Campbell and Terrence Kaufman published a paper in which they argued a core number of loanwords had apparently spread from a Mixe-Zoquean language into many other Mesoamerican languages. Campbell and Kaufman proposed that the presence of these core loanwords indicated that the Olmec—generally regarded as the first "highly civilized" Mesoamerican society—spoke a language ancestral to Mixe-Zoquean. The spread of this vocabulary particular to their culture accompanied the diffusion of other Olmec cultural and artistic traits that appears in the archaeological record of other Mesoamerican societies.

Mixe-Zoque specialist Søren Wichmann first critiqued this theory on the basis that most of the Mixe-Zoquean loans seemed to originate from the Zoquean branch of the family only. This implied the loanword transmission occurred in the period after the two branches of the language family split, placing the time of the borrowings outside of the Olmec period. However new evidence has pushed back the proposed date for the split of Mixean and Zoquean languages to a period within the Olmec era. Based on this dating, the architectural and archaeological patterns and the particulars of the vocabulary loaned to other Mesoamerican languages from Mixe-Zoquean, Wichmann now suggests that the Olmecs of San Lorenzo spoke proto-Mixe and the Olmecs of La Venta spoke proto-Zoque.

At least the fact that the Mixe-Zoquean languages still are, and are historically known to have been, spoken in an area corresponding roughly to the Olmec heartland, leads most scholars to assume that the Olmec spoke one or more Mixe-Zoquean languages.

Religion and mythology

Las Limas Monument 1, considered an important realisation of Olmec mythology. The youth holds a were-jaguar infant, while four iconic supernaturals are incised on the youth's shoulders and knees.

Main article: Olmec mythology

Olmec religious activities were performed by a combination of rulers, full-time priests, and shamans. The rulers seem to have been the most important religious figures, with their links to the Olmec deities or supernaturals providing legitimacy for their rule. There is also considerable evidence for shamans in the Olmec archaeological record, particularly in the so-called "transformation figures".

Olmec mythology has left no documents comparable to the Popul Vuh from Maya mythology, and therefore any exposition of Olmec mythology must rely on interpretations of surviving monumental and portable art (such as the Las Limas figure at right), and comparisons with other Mesoamerican mythologies. Olmec art shows that such deities as the Feathered Serpent and a rain supernatural were already in the Mesoamerican pantheon in Olmec times.

Social and political organization

Little is directly known about the societal or political structure of Olmec society. Although it is assumed by most researchers that the colossal heads and several other sculptures represent rulers, nothing has been found like the Maya stelae (see drawing) which name specific rulers and provide the dates of their rule.

Instead, archaeologists relied on the data that they had, such as large- and small-scale site surveys. These provided evidence of considerable centralization within the Olmec region, first at San Lorenzo and then at La Venta – no other Olmec sites come close to these in terms of area or in the quantity and quality of architecture and sculpture.

This evidence of geographic and demographic centralization leads archaeologists to propose that Olmec society itself was hierarchial, concentrated first at San Lorenzo and then at La Venta, with an elite that was able to use their control over materials such as water and monumental stone to exert command and legitimize their regime.

Nonetheless, Olmec society is thought to lack many of the institutions of later civilizations, such as a standing army or priestly caste. And there is no evidence that San Lorenzo or La Venta controlled, even during their heyday, all of the Olmec heartland. There is some doubt, for example, that La Venta controlled even Arroyo Sonso, only some 35 km away. Studies of the Tuxtla Mountain settlements, some 60 km away, indicate that this area was composed of more or less egalitarian communities outside the control of lowland centers.

Village life and diet

Despite their size, San Lorenzo and La Venta were largely ceremonial centers, and the majority of the Olmec lived in villages similar to present-day villages and hamlets in Tabasco and Veracruz.

These villages were located on higher ground and consisted of several scattered houses. A modest temple may have been associated with the larger villages. The individual dwellings would consist of a house, an associated lean-to, and one or more storage pits (similar in function to a root cellar). A nearby garden was used for medicinal and cooking herbs and for smaller crops such as the domesticated sunflower. Fruit trees, such as avocado or cacao, were likely available nearby.

Although the river banks were used to plant crops between flooding periods, the Olmecs also likely practiced swidden (or slash-and-burn) agriculture to clear the forests and shrubs, and to provide new fields once the old fields were exhausted. Fields were located outside the village, and were used for maize, beans, squash, manioc, sweet potato, as well as cotton. Based on archaeological studies of two villages in the Tuxtlas Mountains, it is known that maize cultivation became increasingly important to the Olmec over time, although the diet remained fairly diverse.

The fruits and vegetables were supplemented with fish, turtle, snake, and mollusks from the nearby rivers, and crabs and shellfish in the coastal areas. Birds were available as food sources, as were game including peccary, oppossum, raccoon, rabbit, and in particular deer. Despite the wide range of hunting and fishing available, midden surveys in San Lorenzo have found that the domesticated dog was the single most plentiful source of animal protein.

History of scholarly research

The jade Kunz Axe, first described by George Kunz in 1890. Although shaped like an axe head, with an edge along the bottom, it is unlikely that this artifact was used except in ritual settings. At a height of 11 in (28 cm), it is one of the largest jade objects ever found in Mesoamerica.

Olmec culture was unknown to historians until the mid-19th century. In 1869 the Mexican antiquarian traveller José Melgar y Serrano published a description of the first Olmec monument to have been found in situ. This monument—the colossal head now labelled Tres Zapotes Monument A—had been discovered in the late 1850s by a farm worker clearing forested land on a hacienda in Veracruz. Hearing about the curious find while travelling through the region, Melgar y Serrano first visited the site in 1862 to see for himself and complete partially exposed sculpture's excavation. His description of the object, published several years later after further visits to the site, represents the earliest documented report of an artifact of what is now known as the Olmec culture.

In the latter half of the 19th century, Olmec artifacts such as the Kunz Axe (right) came to light and were subsequently recognized as belonging to a unique artistic tradition.

Frans Blom and Oliver La Farge made the first detailed descriptions of La Venta and San Martin Pajapan Monument 1 during their 1925 expedition. However, at this time most archaeologists assumed the Olmec were contemporaneous with the Maya – even Blom and La Farge were, in their own words, "inclined to ascribe them to the Maya culture"..

Matthew Stirling of the Smithsonian Institution conducted the first detailed scientific excavations of Olmec sites in the 1930s and 1940s. Stirling, along with art historian Miguel Covarrubias, became convinced that the Olmec predated most other known Mesoamerican civilizations.

In counterpoint to Stirling, Covarrubias, and Alfonso Caso, however, Mayanists Eric Thompson and Sylvanus Morley argued for Classic-era dates for the Olmec artifacts. The question of Olmec chronology came to a head at a 1942 Tuxtla Gutierrez conference, where Alfonso Caso declared that the Olmecs were the "mother culture" ("cultura madre") of Mesoamerica.

Shortly after the conference, radiocarbon dating proved the antiquity of the Olmec civilization, although the "mother culture" question generates much debate even 60 years later.

Etymology

The name "Olmec" means "rubber people" in Nahuatl, the language of the Aztec, and was the Aztec name for the people who lived in the Gulf Lowlands in the 15th and 16th centuries, some 2000 years after the Olmec culture died out. The term "rubber people" refers to the ancient practice, spanning from ancient Olmecs to Aztecs, of extracting latex from Castilla elastica, a rubber tree in the area. The juice of a local vine, Ipomoea alba, was then mixed with this latex to create rubber as early as 1600 BCE.

Early modern explorers and archaeologists, however, mistakenly applied the name "Olmec" to the rediscovered ruins and artifacts in the heartland decades before it was understood that these were not created by people the Aztecs knew as the "Olmec", but rather a culture that was 2000 years older. Despite the mistaken identity, the name has stuck.

It is not known what name the ancient Olmec used for themselves; some later Mesoamerican accounts seem to refer to the ancient Olmec as "Tamoanchan". A contemporary term sometimes used to describe the Olmec culture is tenocelome, meaning "mouth of the jaguar".

Alternative origin speculations

Main article: Olmec alternative origin speculations

See also: Pre-Columbian Africa-Americas contact theories

In part because the Olmecs developed the first Mesoamerican civilization and in part because little is known of the Olmecs (relative, for example, to the Maya or Aztec), a number of Olmec alternative origin speculations have been put forth. Although several of these speculations, particularly the theory that the Olmecs were of African origin popularized by Ivan van Sertima's book They Came Before Columbus, have become well-known within popular culture, they are not considered credible by the vast majority of Mesoamerican researchers.

Gallery

• 
  "The Wrestler", an Olmec era statuette, 1200 – 800 BCE.
• 
  An Olmec mask.
• 
  Colossal Olmec head no. 6 from San Lorenzo Tenochtitlan
• 
  One of the "twins" from El Azuzul
• 
  Bird Vessel, 12th–9th century BCE
• 
  Three celts, Olmec ritual objects.
• 
  An Olmec were-jaguar
• 
  Olmec style bottle, reputedly from Las Bocas, 1100 - 800 BCE
• 
  An Olmec jade mask.
• 
  An Olmec-style painting from the Juxtlahuaca cave.

See also

• El Azuzul - a small archaeological site in the Olmec heartland
• Cerro de las Mesas - a post-Olmec archaeological site
• List of megalithic sites

References

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Benson, Elizabeth P. (1996). "110. Votive Axe". In Elizabeth P. Benson and Beatriz de la Fuente (eds.) (ed.). Olmec Art of Ancient Mexico (To accompany an exhibition at the National Gallery of Art, Washington, June 30 to Oct. 20, 1996 ed.). Washington D.C.: National Gallery of Art. pp. 262–263. ISBN 0-89468-250-4. OCLC 34357584. {{cite book}}: |editor= has generic name (help); templatestyles stripmarker in |author= at position 1 (help)CS1 maint: numeric names: authors list (link)

Bruhns, Karen O. (March 2007). "Did the Olmec Know How to Write?". Science. 315 (5817). Washington, D.C.: American Association for the Advancement of Science: 1365–1366. doi:10.1126/science.315.5817.1365b. ISSN 0036-8075. OCLC 206052590. {{cite journal}}: Unknown parameter |coauthors= ignored (|author= suggested) (help); templatestyles stripmarker in |author= at position 1 (help); templatestyles stripmarker in |coauthors= at position 1 (help)CS1 maint: date and year (link) CS1 maint: numeric names: authors list (link)

Campbell, Lyle (1976). "A Linguistic Look at the Olmec". American Antiquity. 41 (1). Menasha, WI: Society for American Archaeology: 80–89. ISSN 0002-7316. OCLC 1479302. {{cite journal}}: Unknown parameter |coauthors= ignored (|author= suggested) (help); templatestyles stripmarker in |author= at position 1 (help); templatestyles stripmarker in |coauthors= at position 5 (help)CS1 maint: numeric names: authors list (link)

Carlson, John B. (1975) “Lodestone Compass: Chinese or Olmec Primacy? Multidisciplinary Analysis of an Olmec Hematite Artifact from San Lorenzo, Veracruz, Mexico”, Science, New Series, Vol. 189, No. 4205 (Sep. 5, 1975), pp. 753-760 (753).

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Coe, Michael D. (1968). America's First Civilization: Discovering the Olmec. New York: The Smithsonian Library. {{cite book}}: templatestyles stripmarker in |author= at position 1 (help)CS1 maint: numeric names: authors list (link)

Coe, Michael D. (2002). Mexico: from the Olmecs to the Aztecs (5th edition, revised and enlarged ed.). London and New York: Thames & Hudson. ISBN 0-500-28346-X. OCLC 50131575. {{cite book}}: Unknown parameter |coauthors= ignored (|author= suggested) (help); templatestyles stripmarker in |author= at position 1 (help); templatestyles stripmarker in |coauthors= at position 6 (help)CS1 maint: numeric names: authors list (link)

Covarrubias, Miguel (1977) [1946]. "Olmec Art or the Art of La Venta". In Alana Cordy-Collins and Jean Stern (eds.) (ed.). Pre-Columbian Art History: Selected Readings. Robert Pirazzini (trans.) (Reprint of original paper ed.). Palo Alto, CA: Peek Publications. pp. 1–34. ISBN 0-917962-41-9. OCLC 3843930. {{cite book}}: |editor= has generic name (help); templatestyles stripmarker in |author= at position 1 (help)CS1 maint: numeric names: authors list (link)

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External links

• Drawings and photographs of the 17 colossal heads
• El contexto Arquaeologico de la cabeza colosal olmeca numero 7 de San Lorenzo Template:Es
• Stone Etchings Represent Earliest New World Writing Scientific American; Ma. del Carmen Rodríguez Martínez, Ponciano Ortíz Ceballos, Michael D. Coe, Richard A. Diehl, Stephen D. Houston, Karl A. Taube, Alfredo Delgado Calderón, Oldest Writing in the New World, Science, Vol 313, Sep 15 2006, pp1610-1614.
• Olmec Blue Jade Source
• Olmecs Origins in the Mesoamerican Southern Pacific Lowlands