Beyond the Mighty Projectile Point: Techno-functional Study in a Late Pleistocene Artifact, Pilauco Site, Osorno, Northwestern Chilean Patagonia

AbstractAfter a summary assessment of certain selected early man sites in various parts of America, the environment of the Venezuelan coastal plain is discussed in order to evaluate the stratigraphy and radiometric dating of the Taima-Taima site, near Coro, Venezuela, where mammals, many now extinct, were killed by people making El Jobo points about 13,000 years ago.Potentially important areas in Peru, Chile and Brazil are mentioned. Certain problems in the models and interpretation of South American paleoclimates are pointed out.The presence of at least four different bifacially flaked stone projectile point traditions in widely separated and environmentally diverse parts of America between 11,000 and 13,000 yr ago suggests that the immediate cultural antecedents of these traditions were essentially independent of one another. From this it is argued that several early American flaked-stone point traditions developed indigenously in America from technological bases which were present in the Old World Middle Paleolithic.

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Redating Fell's Cave, Chile and the Chronological Placement of the Fishtail Projectile Point

American Antiquity ◽

10.7183/0002-7316.80.2.376 ◽

2015 ◽

Vol 80 (2) ◽

pp. 376-386 ◽

Cited By ~ 22

Author(s):

Michael R. Waters ◽

Thomas Amorosi ◽

Thomas W. Stafford

Keyword(s):

South America ◽

Late Pleistocene ◽

Southern Cone ◽

South American ◽

Before Present ◽

Projectile Point ◽

Radiocarbon Dates ◽

Point Type

Fell's Cave lies near the Magellan Straits of South America's Southern Cone. This was the first site to provide evidence of a late Pleistocene occupation of South America, and it is the site where the Fishtail projectile point type was defined. Previous radiocarbon ages from Fell's Cave on charcoal samples from three hearths in the late Pleistocene artifact-bearing levels yielded dates ranging from ca. 11,000 to 10,100 radiocarbon years before present. New radiocarbon dates on curated charcoal samples from these same hearths yield revised ages of ca. 10,800 to 10,400 radiocarbon years before present. These new dates from Fell's Cave agree well with ages from other South American sites in the Southern Cone with Fishtail points and show that the Fishtail projectile point was made from ca. 10,850 to 10,300 radiocarbon years before present or ca. 12,800 to 12,100 calibrated years before present.

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New evidence of the sabertooth cat Smilodon (Carnivora: Machairodontinae) in the late Pleistocene of southern Chilean Patagonia

Revista chilena de historia natural ◽

10.4067/s0716-078x2010000200010 ◽

2010 ◽

Vol 83 (2) ◽

Cited By ~ 12

Author(s):

ALFREDO PRIETO ◽

RAFAEL LABARCA ◽

VÍCTOR SIERPE

Keyword(s):

Late Pleistocene ◽

Chilean Patagonia ◽

New Evidence

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Decision letter for "Stratigraphy and its environmental implications of the Late Pleistocene Shuidonggou Formation in the western Ordos Block, North China"

10.1002/gj.3972/v2/decision1 ◽

2020 ◽

Keyword(s):

Late Pleistocene ◽

North China ◽

Environmental Implications ◽

Ordos Block

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Acquired Haemophilia: Functional Study of Antibodies to Factor VIII

Thrombosis and Haemostasis ◽

10.1055/s-0038-1650189 ◽

1981 ◽

Vol 45 (03) ◽

pp. 285-289 ◽

Cited By ~ 14

Author(s):

J P Allain ◽

A Gaillandre ◽

D Frommel

Keyword(s):

Factor Viii ◽

Functional Study ◽

Factor Viii Inhibitor ◽

Acquired Haemophilia ◽

Viii Inhibitor ◽

Kinetics Of ◽

Antibody Function ◽

Native Plasma

SummaryFactor VIII complex and its interaction with antibodies to factor VIII have been studied in 17 non-haemophilic patients with factor VIII inhibitor. Low VIII:C and high VIIIR.Ag levels were found in all patients. VIII:WF levels were 50% of those of VTIIRrAg, possibly related to an increase of poorly aggregated and electrophoretically fast moving VIIIR:Ag oligomers.Antibody function has been characterized by kinetics of VIII :C inactivation, saturability by normal plasma and the slope of the affinity curve. Two major patterns were observed:1) Antibodies from 6 patients behaved similarly to those from haemophiliacs by showing second order inhibition kinetics, easy saturability and steep affinity slope (> 1).2) Antibodies from other patients, usually with lower titres, inactivated VIII :C according to complex order kinetics, were not saturable, and had a less steep affinity slope (< 0.7). In native plasma, or after mixing with factor VIII concentrate, antibodies of the second group did not form immune complexes with the whole factor VIII molecular complex. However, dissociation procedures did release some antibodies from apparently low molecular weight complexes formed in vivo or in vitro. For appropriate management of non-haemophilic patients with factor VIII inhibitor, it is important to determine the functional properties of their antibodies to factor VIII.

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