Terrestrial and maritime taphonomy: differential effects on spatial distribution of a Late Pleistocene continental drowned faunal bone assemblage from the Pacific coast of Chile

2015 ◽  
Vol 8 (2) ◽  
pp. 277-290 ◽  
Author(s):  
Patricio López ◽  
Isabel Cartajena ◽  
Diego Carabias ◽  
Carla Morales ◽  
David Letelier ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Late Pleistocene ◽  
Pacific Coast ◽  
Differential Effects ◽  
The Pacific

Late Pleistocene stratigraphy of south-central British Columbia

1978 ◽  
Vol 15 (6) ◽  
pp. 971-980 ◽  
Author(s):  
Robert J. Fulton ◽  
Geoffrey W. Smith
Keyword(s):  
British Columbia ◽  
North America ◽  
Great Lakes ◽  
Late Pleistocene ◽  
Pacific Coast ◽  
Coastal Regions ◽  
South Central ◽  
The Pacific ◽  
Valley Area ◽  
Coast Region

The late Pleistocene deposits of south-central British Columbia record two major glacial and two major nonglacial periods of deposition. The oldest recognized Pleistocene deposits, called Westwold Sediments, were deposited during a nonglacial interval more than 60 000 years ago. Little information is available on the climate of this period, but permafrost may have been present at one time during final stages of deposition of Westwold Sediments. The latter part of this nonglacial period is probably correlative with the early Wisconsin Substage of the Great Lakes – St. Lawrence Valley area. However, deposition of the Westwold Sediments may have begun during the Sangamon Interglacial.Okanagan Centre Drift is the name applied to sediments deposited during the glaciation that followed deposition of Westwold Sediments. Okanagan Centre Drift is known to be older than 43 800 years BP and probably is older than 51 000. It is considered to correlate with an early Wisconsin glacial period.Bessette Sediments were deposited during the last major nonglacial period, which in south-central British Columbia persisted from at least 43 800 years BP (possibly more than 51 000) to about 19 000 years BP. This episode corresponds to Olympia Interglaciation of the Pacific Coast region and the mid-Wisconsin Substage of the Great Lakes – St. Lawrence Valley area. During parts of Olympia Interglaciation the climate was probably as warm as the present-day climate in the interior of British Columbia. Information from coastal regions indicates that there may have been periods of cooler and moister climate.Kamloops Lake Drift was deposited during the last major glaciation of south-central British Columbia. Ice occupied lowland areas from approximately 19 000 to 10 000 years BP. This period corresponds approximately to the Fraser Glaciation of the Pacific Coast region and the late Wisconsin Substage of central and eastern parts of North America.

scholarly journals Spatial distribution and focal mechanisms of aftershocks of the 2011 off the Pacific coast of Tohoku Earthquake

2011 ◽  
Vol 63 (7) ◽  
pp. 669-673 ◽  
Author(s):  
Youichi Asano ◽  
Tatsuhiko Saito ◽  
Yoshihiro Ito ◽  
Katsuhiko Shiomi ◽  
Hitoshi Hirose ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Pacific Coast ◽  
Tohoku Earthquake ◽  
Focal Mechanisms ◽  
The Pacific

Reversed Magnetozone in the Late Pleistocene Sediments from the Pacific Coast of Odaka, Northeast Japan

1977 ◽  
Vol 7 (3) ◽  
pp. 372-379 ◽  
Author(s):  
Ken-Ichi Manabe
Keyword(s):  
Late Pleistocene ◽  
North Atlantic ◽  
Deep Sea ◽  
Pacific Coast ◽  
Marine Terrace ◽  
The North ◽  
The Pacific ◽  
The North Atlantic ◽  
Sea Cliff ◽  
Peak Field

Paleomagnetic measurements have been carried out on 103 specimens taken at about 15 cm intervals in a sea cliff exposing the marine terrace formation. Secondary components were removed by partial demagnetization in a peak field of 200 Oe. Two short reversed magnetozones are recognized. Geological and biostratigraphical evidence indicates that they are equivalent to the Blake event, which was first reported by Smith and Foster (1969) (Science 163 , 565–567) from the North Atlantic deep-sea cores. The present result suggests a split nature for the Blake Event.

A late pleistocene human presence at Huaca Prieta, Peru, and early Pacific Coastal adaptations

2012 ◽  
Vol 77 (3) ◽  
pp. 418-423 ◽  
Author(s):  
Tom D. Dillehay ◽  
Duccio Bonavia ◽  
Steve L. Goodbred ◽  
Mario Pino ◽  
Victor Vásquez ◽  
...  
Keyword(s):  
Late Pleistocene ◽  
Pacific Coast ◽  
Coastal Environments ◽  
Human Occupation ◽  
Radiocarbon Dates ◽  
The Pacific ◽  
Northern Peru ◽  
Coastal Adaptations ◽  
New Evidence ◽  
Early Human

Archaeological excavations in deep pre-mound levels at Huaca Prieta in northern Peru have yielded new evidence of late Pleistocene cultural deposits that shed insights into the early human occupation of the Pacific coast of South America. Radiocarbon dates place this occupation between ~ 14,200 and 13,300 cal yr BP. The cultural evidence shares certain basic technological and subsistence traits, including maritime resources and simple flake tools, with previously discovered late Pleistocene sites along the Pacific coast of Peru and Chile. The results help to expand our knowledge of early maritime societies and human adaption to changing coastal environments.

scholarly journals Setting the Stage: The Late Pleistocene Colonization of North America

Quaternary ◽  
2018 ◽  
Vol 2 (1) ◽  
pp. 1 ◽  
Author(s):  
Michael O’Brien
Keyword(s):  
North America ◽  
Late Pleistocene ◽  
New World ◽  
Pacific Coast ◽  
Ice Sheets ◽  
Land Bridge ◽  
Projectile Points ◽  
Bering Land Bridge ◽  
The Pacific ◽  
Northern Half

The timing of human entrance into North America has been a topic of debate that dates back to the late 19th century. Central to the modern discussion is not whether late Pleistocene-age populations were present on the continent, but the timing of their arrival. Key to the debate is the age of tools—bone rods, large prismatic stone blades, and bifacially chipped and fluted stone weapon tips—often found associated with the remains of late Pleistocene fauna. For decades, it was assumed that this techno-complex—termed “Clovis”—was left by the first humans in North America, who, by 11,000–12,000 years ago, made their way eastward across the Bering Land Bridge, or Beringia, and then turned south through a corridor that ran between the Cordilleran and Laurentide ice sheets, which blanketed the northern half of the continent. That scenario has been challenged by more-recent archaeological and archaeogenetic data that suggest populations entered North America as much as 15,300–14,300 years ago and moved south along the Pacific Coast and/or through the ice-free corridor, which apparently was open several thousand years earlier than initially thought. Evidence indicates that Clovis might date as early as 13,400 years ago, which means that it was not the first technology in North America. Given the lack of fluted projectile points in the Old World, it appears certain that the Clovis techno-complex, or at least major components of it, emerged in the New World.

Initial Occupation of the Pacific Coast of Chile during Late Pleistocene Times

2007 ◽  
Vol 48 (5) ◽  
pp. 725-731 ◽  
Author(s):  
Donald Jackson ◽  
César Méndez ◽  
Roxana Seguel ◽  
Antonio Maldonado ◽  
Gabriel Vargas
Keyword(s):  
Late Pleistocene ◽  
Pacific Coast ◽  
The Pacific

Late Pleistocene Archaeological Discovery Models on the Pacific Coast of North America

PaleoAmerica ◽  
2019 ◽  
Vol 6 (1) ◽  
pp. 43-63 ◽  
Author(s):  
Duncan McLaren ◽  
Daryl Fedje ◽  
Quentin Mackie ◽  
Loren G. Davis ◽  
Jon Erlandson ◽  
...  
Keyword(s):  
North America ◽  
Late Pleistocene ◽  
Pacific Coast ◽  
The Pacific

scholarly journals Experimental Re-creation of the Depositional Context in Which Late Pleistocene Tracks Were Found on the Pacific Coast of Canada

2021 ◽  
pp. 91-100
Author(s):  
Duncan McLaren ◽  
Quentin Mackie ◽  
Daryl Fedje
Keyword(s):  
Late Pleistocene ◽  
Pacific Coast ◽  
Clayey Soil ◽  
High Tide ◽  
Plant Macrofossils ◽  
Site Formation ◽  
Storm Event ◽  
Site Formation Processes ◽  
The Pacific ◽  
The University

AbstractTo better understand the depositional context of Late Pleistocene human tracks found at archaeology site EjTa-4 on Calvert Island, on the Pacific Coast of Canada, we present here the results of an experiment designed to recreate the conditions by which these tracks were formed, preserved and then revealed through excavation. Based on radiocarbon ages on small twigs and the analysis of sediments and microfossils, the interpretation of the site formation processes relate that the tracks were impressed into a clayey soil substrate just above the high tide line between 13,317 and 12,633 calBP. The features were subsequently encapsulated by black sand, which washed over the tracks from the nearby intertidal zone during a storm event. To test this interpretation, we enlisted the aid of high school student volunteers to recreate the conditions by which the tracks were formed. A clayey substrate was prepared in a laboratory setting at the University of Victoria and a few plant macrofossils were placed on top it. This was followed by having the students create tracks in the clay, which were then covered with a layer of sand. Upon excavation of these experimental tracks, we found that they had a very similar character to those found in the field, including the pressing of macrofossils into the clay by the weight of the track maker. These results support the interpretation and chronological assessment of the depositional events that occurred during late Pleistocene times at archaeology site EjTa-4.

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