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    Quaternary International 142143 (2006) 7986

    A preliminary view of the coexistence of mammoth and early

    peoples in Me xico

    Joaqun Arroyo-Cabralesa,, Oscar J. Polacoa, Eileen Johnsonb

    aLaboratorio de Arqueozoologa M. en C. Ticul Alvarez Solorzano, Subdireccion de Laboratorios y Apoyo Academico,

    Instituto Nacional de Antropolog a e Historia, Moneda # 16, Col. Centro, 06060 Me xico, D. F., MexicobMuseum of Texas Tech University, Box 43191, Lubbock, Texas 79409-3191, USA

    Received 10 March 2005; accepted 16 March 2005

    Available online 13 June 2005

    Abstract

    A progress report about humanmammoth interactions in Me xico is provided based primarily on a literature search. More than

    270 mammoth localities are known in Me xico, but only 17 of them have shown some evidence of an association between early

    peoples and mammoth. However, that number is even less when each locality is assessed in detail, due to the lack of a supportable

    association or the loss of the actual specimens that precludes their analysis using current techniques. Only six localities have

    modified mammoth bone. Among them, the greatest potential for demonstrating such a relationship is at Santa Isabel Iztapa,

    Valsequillo, Villa de Guadalupe, and Tocuila. Establishing an analysis methodology for the materials from those, as well as new

    localities, is warranted to provide the basis for interpreting the humanmammoth relationship in Mexico. Future research calls for

    detailed stratigraphic and radiometric control and an analytical protocol for bone analysis focused on taphonomy and

    biotechnology.

    r 2005 Elsevier Ltd and INQUA. All rights reserved.

    1. Introduction

    During the late Pleistocene, the North American

    grasslands stretched from the Great Plains and south-

    eastward down through the Basin of Me xico. The extent

    of these grasslands and the resources they contained are

    significant aspects in examining the late Pleistocene

    peopling of the landscape and evidence for early

    occupations.

    The late Pleistocene grassland corridor from northern

    Me xico to the Basin of Me xico is bounded on the east bythe Sierra Madre Oriental and the west by the Sierra

    Madre Occidental ranges (Fig. 1). This general region

    today is termed the desert grassland (Coupland, 1992;

    Schmutz et al., 1992). In general, the climatic regime is

    cool and moist up to ca. 18,000 yr BP (last glacial

    maximum) and then cool and dry in the Basin of Me xico

    and cool and moist in northern Me xico until the end

    of the Wisconsinan (Metcalfe et al., 2000). A series of

    lacustrine basins occur in the volcanic highlands of

    central Me xico, with the Basin of Me xico being the

    largest. A mixed pine and oak forest and grassland

    setting expands and contracts while lake levels and

    water chemistry fluctuate in the basin (Gonza lez-

    Quintero, 1986; Bradbury, 1989, 1997; Lozano-Garca

    et al., 1993; Lozano-Garca and Ortega-Guerrero, 1998;

    Metcalfe et al., 2000).Typical Rancholabrean herd herbivores (mammoth,

    bison, horses, camel) ranged throughout the grassland

    along with attendant large carnivores (Pleistocene lion,

    saber-toothed cat, short-faced bear, and lynx). Different

    genera of deer and ground sloth inhabited the wooded

    hill slopes along with black bear, American mastodon,

    and gomphotheres. This dominant grassland ecosystem

    within a composite region and its resources provided the

    setting early peoples encountered and used at the end of

    ARTICLE IN PRESS

    1040-6182/$- see front matter r 2005 Elsevier Ltd and INQUA. All rights reserved.

    doi:10.1016/j.quaint.2005.03.006

    Corresponding author.

    E-mail addresses: [email protected] (J. Arroyo-Cabrales),

    [email protected] (E. Johnson).

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    the Pleistocene (Arroyo-Cabrales et al., 1998; Polaco

    et al., 2001; Johnson et al., 2002).

    Proboscideans are among an important suite of

    animals in examining the coexistence of early peoples

    and extinct fauna in Me xico. For the late Pleistocene,

    four genera are known for this group, the gomphotheres

    Cuvieronius and Stegomastodon having one species each,

    the American mastodon Mammut americanum, and the

    Plains mammoth Mammuthus columbi (Polaco, 2002).

    The only one that has been found in association withevidence of human activity is the mammoth.

    Mammoth is an animal that lived throughout most of

    North America during the Pleistocene, from northern

    Canada and Alaska (USA) to southern Me xico and

    northern Central America (Agenbroad, 1984; Arroyo-

    Cabrales et al., 1998, 2003). During the late Pleistocene,

    they coexisted with early peoples who populated North

    America. However, little information about the nature

    of that coexistence is available for the most southern

    populations. Evidence for early peoples in late Pleisto-

    cene Me xico includes human remains (Gonzalez et al.,

    2003), lithics (Aveleyra Arroyo de Anda and Maldona-

    do Koerdell, 1953; Aveleyra A. de Anda, 1956), hearths

    (Lorenzo and Mirambell, 1981, 1986), possible camps

    (Aveleyra-Arroyo de Anda, 1962), modified bone

    (Ba rcena, 1882; Solo rzano, 1989), and use of faunal

    resources as a food item (Aveleyra A. de Anda, 1956). If

    the relationship of early people and mammoth was

    through people hunting them, then many localities

    should demonstrate that relationship with physical

    evidence. However, while late Wisconsinan mammoth

    localities are common in the Basin of Me xico andelsewhere on the Mexican Plateau (Arroyo-Cabrales

    et al., 1998, 2003), those associated with early peoples

    are rare.

    2. Historical review

    Written reports on the presence of mammoth in

    Me xico are first documented more than 400 years ago.

    At least 271 localities all over Me xico are known to

    contain mammoth remains, from an isolated molar to

    an almost complete skeleton (Arroyo-Cabrales et al.,

    ARTICLE IN PRESS

    Fig. 1. Me xico showing the grassland corridor to the Basin of Me xico.

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    2003). Where identified, the species is M. columbi, the

    southern or plains mammoth. From those localities, a

    minor percentage is reported to have evidence of a

    humanmammoth relationship (17), representing less

    than 6.3% of the known mammoth localities. Those

    localities have been investigated over the past 140 years

    of research. Among these, the bone assemblages ingeneral from 11 localities (64.7%; all discovered before

    1970) have been lost or their present location is

    unknown, preventing any further discussion about their

    significance. The other six localities (35.3%) are better

    suited for providing evidence of humanmammoth

    relationships.

    The first evidence of a human-extinct fauna relation-

    ship came from the hill Cerro de las Palmas in the

    area of Tacubaya, inside the Basin of Me xico (Fig. 2).

    This discovery in 1860 was the result of studies

    undertaken by members of the French Scientific

    Commission about the prehistory of Me xico. A lithic

    side-scraper was associated with numerous probosci-

    dean fossils (Aveleyra-Arroyo de Anda, 1962; Hamy,

    1878, 1884). This discovery initiated the search for early

    peoples in Me xico (Aveleyra Arroyo de Anda, 1964),

    leading to the discoveries of the sacro de Tequixquiac

    (Ba rcena, 1882; Fig. 2), and of human remains inside the

    Basin of Me xico (Aveleyra-Arroyo de Anda, 1962).

    Herrera (1893) wrote the first synthesis of these

    discoveries. He noted that some proboscidean remains

    from an unspecified locality showed cuts on thecondyles, as did an articular condyle from a femur

    collected in Leo n (Guanajuato). The paper had two

    drawings of bones, one of which (possibly Leo n) was a

    rubbing onto carbon paper of the cuts. Villada (1903)

    pointed out that the second specimen was collected in

    Tequixquiac (Estado de Me xico).

    In 1893 in the interior lake of Zacoalco (Jalisco), a

    fossil whale vertebra was found with two wide cuts in

    the transverse apophysis (Solo rzano, 1989). This dis-

    covery suggested at the time the potential of the region

    in the search for late Pleistocene sites of early peoples.

    Those first discoveries were questioned and Villada

    (1903) pointed out that a strong controversy existed

    about early human presence in ancient times and

    peoples association with the extinct fauna. This early

    ARTICLE IN PRESS

    Fig. 2. The Basin of Me xico showing the known localities with a record of humanmammoth relationship.

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    stage of doubt lasted several decades. A new stage of

    systematic explorations, however, began in 1945 that

    settled any doubts of humanmammoth coexistence

    (Aveleyra Arroyo de Anda, 1964).

    By the 1950s, several sites were known, mainly in the

    Basin of Me xico. At Santa Isabel Iztapa (Estado de

    Me xico), excavated in 1952 and 1954, mammothskeletons were associated with lithics (Fig. 2). The

    1952 mammoth had a minimum age date of

    90007250 yr BP (Aveleyra Arroyo de Anda, 1964).

    No radiocarbon dates were available for the 1954

    mammoth. However, the 1954 bones had possible cut

    marks on a large number of the epiphyses and

    articulating facets of the long bones (Aveleyra A. de

    Anda, 1956). A rib segment with deep incisions was the

    only bone properly documented and illustrated, and is

    the only one that has survived from this excavation.

    Other localities in the basin included the area of

    Tepexpan (Fig. 2), where in 1945, lithics were uncovered

    associated with proboscidean bones (Arellano, 1946).

    This discovery corresponded with the same area where

    the Tepexpan man was found (De Terra, 1949). At

    the same place in 1958, other mammoth remains were

    recovered and those bones purportedly showed cut

    marks (Aveleyra Arroyo de Anda, 1964). In 1956, at Los

    Reyes Acozac (Fig. 2), lithics were found in association

    with mammoth bones. In 1957, a similar find in San

    Bartolo Atepehuacan was radiocarbon dated at

    96707400 yr BP. Finally, in 1974 at Los Reyes La Paz

    (Fig. 2), two bone artifacts were recovered that were

    associated stratigraphically with mammoth and other

    extinct animals. This site had a radiocarbon date of

    18,2807160yr BP (Garca Cook, 1974).

    For the same period, and outside the Basin of Me xico,

    two localities in the state of Tamaulipas (one at Arroyo

    Arenillas; Fig. 3) had lithics associated with mammothbones (Aveleyra Arroyo de Anda, 1964). The Falcon

    Dam, however, flooded Arroyo Arenillas. Previously, in

    1946, MacNeish had recorded a possible hearth with the

    burned bones of extinct animals below those of

    mammoth in Arroyo Chorreras (Aveleyra-Arroyo

    de Anda, 1962) (Fig. 3).

    In 1957, lithics were recorded in association with

    mammoth in the region around the Zacoalco Lake

    (Jalisco) (Aveleyra-Arroyo de Anda, 1962) (Fig. 3). In

    the Valsequillo region (state of Puebla; Fig. 3), Armenta

    Camacho (1978) recorded a mammoth right mandibular

    ramus with a lithic artifact adhered to it by an

    unidentified precipitate from a site named Arenillas,

    along with other bones with possible human modifica-

    tions. In general, Valsequillo was reported to contain

    human-modified mammoth remains (Armenta, 1959;

    Armenta Camacho, 1978). However, in a recent search,

    those remains could not be located. Confusing and

    conflicting evidence provided dates for the regional

    fauna between 21,500 and 280,000 yr BP (Armenta,

    1959; Armenta Camacho, 1978; Steen-McIntyre et al.,

    1981; Pichardo, 1997).

    ARTICLE IN PRESS

    Fig. 3. Me xico showing the known localities with a record of humanmammoth relationship (other than those in the Basin of Me xico).

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    3. Later discoveries

    Since 1970, six archaeological sites have been docu-

    mented in Me xico regarding people-mammoth relation-

    ships. Sites in the Basin of Me xico are La Villa de

    Guadalupe, Distrito Federal (unpublished data), and

    Tocuila, Estado de Me xico (Morett et al., 1998a, b;Johnson et al., 2001) (Fig. 2). Outside the basin, and in

    chronological order, sites are: El Cedral, San Luis Potos

    (Lorenzo and Mirambell, 1986, 1999); basins of

    Chapala-Zacoalco, Jalisco (Solo rzano, 1989); Zacapu,

    Michoaca n (unpublished data); and La Estanzuela,

    Nuevo Leo n (Lo pez-Oliva et al., 2001; Polaco et al.,

    2001). Most of these sites are located in central Me xico

    (Fig. 3).

    The El Cedral site (Fig. 3) was the most interesting.

    Several springs were in the region at the end of the

    Pleistocene. Current vegetation is desert shrub (Schmutz

    et al., 1992; Rzedowski, 1994; Gonza lez Medrano,

    2003). Although the late Pleistocene vegetational record

    is not yet known for the region, the vegetation probably

    was different due to more humid conditions.

    Three faunal stages were defined for the age intervals,

    between 30,000 and 25,000 yr BP, around 15,000 yr BP,

    and between 10,000 and 8000 yr BP (T. A lvarez, pers.

    comm., 2001). While Mammut americanum and Mam-

    muthus columbi coexisted at this locality, the plains

    mammoth was the most abundant. Evidence of human

    presence was associated with mammoth, but not

    mastodon.

    Site excavations between 1977 and 1980 produced a

    very rich and abundant fauna. Mammoth remainsarranged in an undisturbed circular feature consisted

    of carpal and metacarpal bones surrounding a zone of

    charcoal about 30 cm in diameter and 2 cm thick. This

    feature was interpreted as a hearth. The hearth bones

    consisted of four right carpals, a right metacarpal, two

    left carpals, and a left metacarpal. AMS radiocarbon

    assays on those bones were not successful due to the lack

    of collagen (S. Gonza lez, pers. comm., 2000; Oxford

    University Radiocarbon Unit). The ash from the hearth

    was dated at 31,85071600 yr BP (I10438). This date

    was the oldest one for human presence in Me xico, and

    one of the most ancient for Mexican mammoths(Lorenzo and Mirambell, 1986). It is also important

    since it pre-dates the Clovis culture. An assessment of

    this date due to its very old age, then, is warranted.

    Lithics were associated with nine bones of different

    animals (horse and canids) that showed some modifica-

    tions. A chalcedony circular scraper, a limestone core,

    and a quartz polyhedral flake were among the lithics

    (Lorenzo and Mirambell, 1981, 1999). The modified

    bones showed either scratching, boring, polishing, or cut

    marks. Some were interpreted as possibly tools such as

    picks (Lorenzo and Mirambell, 1981; L. Mirambell,

    pers. comm., 2003). However, these materials were not

    placed in one of the faunal stages that would have dated

    them.

    In the region around the Chapala-Zacoalco lakes

    (Fig. 3), an important set of modified bones contained

    some that appear to have been used as tools interpreted

    as wedges (Solo rzano, 1989). Mammoth and bones of

    other extinct animals had been collected during severaldecades. Unfortunately, these materials were from the

    surface, without further data, thus providing limited

    information about the archaeological context (Solo rza-

    no, 1989).

    In Zacapu, Michoaca n (Fig. 3), five segments of

    mammoth long bones were recovered. One of these had

    possible cut marks, similar to marks on the Santa Isabel

    Iztapa rib. The bones were an isolated feature, without

    an associated fauna.

    The most recent record outside the Basin of Me xico is

    a bone bed found in La Estanzuela, 10 km south of

    Monterrey, Nuevo Leo n (Fig. 3). More than 100 bones

    have been recovered representing five taxa, Mammuthus

    columbi, Mammut americanum, Camelops hesternus,

    Bison sp., and Equus spp. Among those, a mammoth

    scapula possibly has transverse cut marks, suggesting

    human presence at the time of deposition of the

    proboscidean remains (Lo pez-Oliva et al., 2001; Polaco

    et al., 2001).

    In the Basin of Me xico, two recently discovered

    localities indicate humanmammoth relationships. At

    La Villa de Guadalupe (O. J. Polaco, unpublished data;

    Fig. 2), a tusk and mandible show extensive cut marks

    that need to be confirmed as to what taphonomic agency

    produced them. Recently, the material has been dated at11,320 yr BP (OxA-7752; Gonzalez et al., 2003). The

    mammoth remains (M. columbi) are associated with

    other animals, including Pleistocene horse (Equus spp.),

    ground sloth (cf. Megalonyx sp.), and freshwater

    turtle (Kinosternon sp.). A mammoth fibula possibly

    has been used as a drill, and a vertebral portion

    may have been used as a scraper. A full taphonomic

    analysis is warranted to determine the agencies of bone

    modification.

    Tocuila is located along the paleoshore of Lake

    Texcoco in the Basin of Me xico, an area of numerous

    mammoth finds both archaeological and paleontologicalin nature (Arroyo-Cabrales et al., 1998, 2003). This site

    has several dates that average around 11,200 yr BP. In

    well-stratified deposits, the disarticulated remains of at

    least five mammoths are in a volcanic mud flow (lahar)

    unit. From about 1000 bones in the assemblage, ca. 1%

    of them exhibit dynamic impact features and other types

    of modifications that indicate the bone reduction

    process involved breakage of fresh bones in a very

    controlled, deliberate, and systematic manner. This

    situation is the basis for identifying culturally modified

    bone that indicates human activity being represented at

    this locality.

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    While human involvement with mammoth at Tocuila

    is limited, it is focused on breakage of fresh limb bones

    and interpreted as bone quarrying to produce cores for

    transport elsewhere (Johnson et al., 2001). The cultu-

    rally modified bone represents part of a continuum in

    quarrying operations to produce portable radial seg-

    ments for various production purposes (Johnson, 1985,2004). This assemblage consists of a parent element

    portion, cone flakes (interior pressure flakes from the

    compressive force and crushing effect at the point of

    impact), cortical flakes, radial diaphyseal segments, and

    a core. The parent element portion, cone flakes, and

    radial diaphyseal segments are the result of the initial

    dynamic fracturing of the targeted limb element. They

    represent the technological debris from that fracturing.

    The core, on the other hand, is a radial diaphyseal

    segment that has been modified and prepared purpose-

    fully in order to produce the large cortical flakes (Fig. 4).

    What the Tocuila mammoths in general represent is

    unclear as information is not yet available on the age,

    gender, and carcass condition of the five mammoths nor

    their relationship to the bone core, flakes, and fracture

    debris recovered other than presence in the same bone

    bed. Full taphonomic and spatial analyses are needed in

    order to clarify that relationship and determine the

    formation and disturbance processes involved in creat-

    ing the Tocuila locality.

    4. Future directions

    Future research in Me xico calls for detailed strati-

    graphic and radiometric controls for both previously

    known localities and sites, and new locations in order to

    better understand the distribution of mammoth through

    time and space and the relationship between this ancientproboscidean and early peoples. Remains from the

    known localities have complex life histories involving

    various natural and possible cultural modifications. In

    order to understand these localities and future ones, a

    protocol is being developed with a focus on methodol-

    ogy that is based on taphonomy and biotechnology.

    Research criteria include the systematic review of the

    collections by the authors to confirm bone modification

    and the responsible agency.

    The taphonomic analysis needs to be focused on

    determining the agency or agencies involved in site

    formation and the agency or agencies involved in

    modification to the bones. A taphonomic profile of the

    overall bone assemblage provides the context in which

    to interpret the relationship and relative importance of

    any one type of modification. Both a regional picture

    can be developed from the general individual locality

    profiles as well as indicating points of departure in that

    regional pattern.

    Bone modification, whether natural or cultural, needs

    to be based on identified criteria applied in a systematic

    manner. For such natural bone modification as carni-

    vore activity and trampling, these types of marks are

    identified on established criteria (e.g., Shipman, 1981,

    1989; Johnson, 1985; Olsen and Shipman, 1988;Blumenschine and Salvaggio, 1991; Calpaldo and

    Blumenschine, 1994; Lyman, 1994), classification of

    carnivore activity, and scanning electron microscopy

    (SEM) in order to segregate and distinguish them from

    cultural marks.

    The types of cultural modification to mammoth

    remains are central to the case being developed for a

    humanmammoth relationship in Me xico. Modification

    is characterized as marks on bone and as bone breakage.

    Cultural marks are identified on established criteria

    (e.g., Shipman, 1981, 1989; Shipman and Rose, 1983,

    1984; Lyman, 1994) and more recent findings (e.g.,Saunders and Daeschler, 1994; Johnson, 2000, 2004). A

    number of consistencies will need to be noted to indicate

    a regular or standardized way of producing those marks

    in particular places on the bones. The marks themselves

    will need to have common features that characterize

    them and the marks appear in a regular pattern. Those

    features, overall pattern, and internal complexity of

    marks provide the basis for the argument that the marks

    are cultural and not random occurrences.

    These data also would provide the basis for exploring

    procurement strategy (Johnson, 2004). Issues that could

    be addressed include determining whether mammoth

    ARTICLE IN PRESS

    Fig. 4. Bone core from Tocuila in the Basin of Me xico.

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    was hunted, scavenged, or both; whether hunted as a

    targeted or encountered game animal; procurement

    purpose (subsistence, economic, or both); whether small

    herds were cropped or individual males sought out; and

    seasonal time of death and age profiles.

    While the authors approach is a taphonomic one to

    help address the issue of the relationship of early peoplesand mammoth, other lines of evidence are as critical. In

    tandem with the taphonomy, a paleontological-popula-

    tion dynamics approach is being developed for probos-

    cidean remains to investigate taxon, age, season of

    death, sex, and biometrics. Beyond the scope of the

    authors research design are the needs for continuing

    investigations in paleovegetation, landscape develop-

    ment, and Quaternary volcanology for paleoenviron-

    mental reconstructions and in lithic technology at

    purported early sites.

    5. Summary

    More than 270 mammoth localities are known in

    Me xico, but only 17 of them have shown some evidence

    of an association between early peoples and mammoth.

    However, that number is even less when each locality is

    assessed in detail. Only six localities have modified

    mammoth bone. Those assemblages require detailed

    analyses in order to present a clear statement on the

    relationship between humans and mammoths. Among

    those six localities, the greatest potential for demon-

    strating such a relationship is at Santa Isabel Iztapa,

    Valsequillo, Villa de Guadalupe, and Tocuila. Establish-ing an analysis methodology for the materials from

    those, as well as new localities, is warranted to provide

    the basis for interpreting the humanmammoth relation-

    ships in Me xico. Furthermore, defining the human role,

    either as hunter or scavenger of mammoth, is needed for

    understanding human social evolution in Me xico.

    Acknowledgements

    Thanks are due to Dr. Silvia Gonzalez (School of

    Biological and Earth Sciences, Liverpool John MooresUniversity), Lorena Mirambell (Instituto Nacional de

    Antropologa e Historia), and the late Ticul A lvarez

    (formerly at the Instituto Nacional de Antropologa e

    Historia) for sharing information; and for the technical

    support provided by Tara Johnson (Documentation

    Specialist, Museum of Texas Tech University) for the

    photographic figure. Felisa J. Aguilar (Instituto Nacio-

    nal de Antropologa e Historia) kindly helped with the

    figures and graphics. Richard Morlan and Dan Joyce

    reviewed an earlier version of this manuscript, and their

    comments helped to improve its content; however, any

    errors are those of the authors. The long-term study is a

    joint research venture between the Instituto Nacional de

    Antropologa e Historia (Me xico) and the Museum of

    Texas Tech University (USA). This manuscript repre-

    sents part of the ongoing Lubbock Lake Landmark

    regional research into late Quaternary paleoecology,

    taphonomy, and grasslands hunter-gatherers on the

    Southern Plains.

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