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Title: ARCHAIC FORAGERS OF THE NORTHERN RIO GRANDE VALLEY

Authors:
 [1]
  1. Los Alamos National Laboratory
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1329829
Report Number(s):
LA-UR-07-2712
DOE Contract Number:
AC52-06NA25396
Resource Type:
Conference
Resource Relation:
Conference: 72ND ANNUAL MEETING OF THE SOCIETY FOR AMERICAN ARCHAEOLOGY ; 200704 ; AUSTIN
Country of Publication:
United States
Language:
English

Citation Formats

VIERRA, BRADLEY J. ARCHAIC FORAGERS OF THE NORTHERN RIO GRANDE VALLEY. United States: N. p., 2007. Web.
VIERRA, BRADLEY J. ARCHAIC FORAGERS OF THE NORTHERN RIO GRANDE VALLEY. United States.
VIERRA, BRADLEY J. Mon . "ARCHAIC FORAGERS OF THE NORTHERN RIO GRANDE VALLEY". United States. doi:. https://www.osti.gov/servlets/purl/1329829.
@article{osti_1329829,
title = {ARCHAIC FORAGERS OF THE NORTHERN RIO GRANDE VALLEY},
author = {VIERRA, BRADLEY J.},
abstractNote = {},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Apr 23 00:00:00 EDT 2007},
month = {Mon Apr 23 00:00:00 EDT 2007}
}

Conference:
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  • Last year at these meetings I proposed a possible seasonal transhumance pattern for the Late Archaic in the northern Rio Grande region. This pattern involved the movement of groups from the lowland juniper-savanna grasslands in the early summer, to the upland ponderosa pindmixed conifer forests in the mid to late summer, and then back down to the piiion-juniper woodlands during the fall. The Rio Grande Valley was also used for winter habitation sites. Following on this research, I take the next step by studying the inter-assemblage variability represented in a sample of open-air sites located within each of these vegetationmore » communities. The results indicate that there are significant differences in reduction tactics represented between valley habitation vs., upland campsites, and that these site sites are linked together by obsidian procurement patterns.« less
  • The Pliocene Puye Formation is a well-exposed, volcanogenic, alluvial fan sequence 150+ m thick, representing a range of volcaniclastic deposits (proximal, medial, and distal) that may be generated in response to long-lived, multicompositional (basaltic to rhyolitic) volcanism in a rift setting. The deposits are a composite of eruptives (effusives and pyroclastics) and epiclastics (reworked primary volcanics). An almost complete record of source-area volcanics (style, intensity, and composition) is preserved in the volcaniclastic fan deposits, as sedimentation rates were high and basinal subsidence was continuous because of concomitant rift downfaulting. At least eight silicic, primary airfall beds are interstratified through themore » fan deposits and provide a reliable stratigraphic control for establishing vertical and lateral lithofacies correlations. Proximal (inner fan) lithofacies include voluminous block-and-ash deposits that have downfan facies equivalents as pyroclastic flows and mudflows. Other proximal facies include very coarse clast-bearing debris flows, boulder-rich stream-channel and hyperconcentrated flood-flow deposits, and minor sheet-flood sequences. Medial (midfan) deposits display the greatest variability in lithofacies and provide details of the rate and intensity of volcanism by means of a distinctive vertical lithofacies assemblage: a basal plinian layer, stacked debris flows, and stacked mudflows, capped by a fluvial reworking phase of interstratified stream-channel and sheetflood deposits. Debris flows (clast and matrix rich), mudflows, and hyperconcentrated flood-flow deposits are abundant; the latter show evidence of transformation to mudflows with increasing transport distance, as they incorporate added fines (ash). Sheetflood deposits increase in number and thickness at the expense of stream-channel deposits.« less
  • A residual Bouguer gravity anomaly map of northern New Mexico has been generated. Previous available Bouguer gravity anomaly maps did not readily indicate the presence of a crust or mantle feature along the Rio Grande Rift. The resultant residual anomaly map has a well defined gravity high 160 kilometers wide extending north-south across the entire map from south of 34/sup 0/ into Colorado along the Rift. The area of the Sierra Grande Arch is another prominent high whereas the San Juan Basin is a well defined low. The Rift gravity expression appears to correlate with heat flow variations, earthquake epicentersmore » and geodetic leveling anomalies. When the residual maps of Arizona and New Mexico are spliced together prominent northeasterly and east-west anomaly trends can be seen to traverse the area. Anomalies and trends reflecting shallow crustal sources as well as more regional but subtle anomalies related to sources deeper in the crust and upper mantle are defined in the residual anomaly map.« less
  • A flight of unpaired late Quaternary terraces comprised of fluvio-glacial deposits flanks the northern Rio Grande River for nearly ten miles along the upper Rio Grande valley. These terraces, which occur at decreasing heights due to progressive valley incision, are comprised of sediments that represent aggradation by braided streams flowing from the terminus of valley glaciers that flowed down the upper Rio Grande at least twice during late Quaternary time. Terminal moraines that are equivalent to Pinedale and Bull Lake stages of ice advance occur at the upstream origin of the terraces. Incision of the Rio Grande river since Pinedalemore » time has resulted in at least three cut terraces that converge downstream. The purpose of this report is to reconstruct the Quaternary history of the Rio Grande river valley during its transition from full glacial to interglacial conditions. A total geodetic station provided coordinate and elevation data to correlate the terraces, extrapolate channel geometry through cross sections, and construct longitudinal profiles of the individual terrace surfaces. Measurements of the B-axis length of boulders on both terrace tread surfaces and surfaces within the terrace deposits were used to reconstruct paleoflow hydrology. The coarsest channel morphological features, too large to be deposited by normal glacial outwash, were deposited during a catastrophic outburst flood (after the failure of an ice dammed lake) that produced high discharge.« less
  • This study is concerned with the uplift history of the mountain ranges that bound the eastern margin of the Rio Grande rift in northern New Mexico. The principal objectives of this paper are to present the results of fission-track dating of granitic rocks from three ranges on the eastern margin of the rift, and to use these dates to infer the approximate timing and the rate of uplift and erosion in each range. These data are then used to place constraints on the paleographic evolution of northern New Mexico between the Late Cretaceous and the early Miocene. The paleogeography showsmore » that the ranges on the eastern margin of the early rift were not as continuous along the length of the rift as the ranges observed today. 41 references, 8 figures, 1 table.« less