Pleistocene Mammals from Gold Run Creek, Yukon Territory

1973 ◽  
Vol 10 (5) ◽  
pp. 697-759 ◽  
Author(s):  
C. R. Harington ◽  
F. V. Clulow
Keyword(s):  
Yukon Territory ◽  
Radiocarbon Date ◽  
Common Elements ◽  
Radiocarbon Dates ◽  
Equus Asinus ◽  
Wild Ass ◽  
Pleistocene Mammals ◽  
First Time

Remains of thirteen species of mammals are reported from Pleistocene deposits at Gold Run Creek near Dawson, Yukon Territory. Eight of the thirteen species are extinct and two are no longer living in the Yukon. The most common elements of the fauna are Equus (Asinus) lambei (Yukon wild ass), and Bison crassicornis (large-horned bison). Taxidea (badger) and Bison alaskensis (Alaskan bison) are reported for the first time from the Yukon Pleistocene. A kiang-like horse is also reported from deposits at Gold Run Creek.These mammals may have inhabited a cool grassland or open parkland during late Wisconsin time. Bison crassicornis and mammoth bone from deposits at Gold Run Creek have yielded radiocarbon dates of 22 200 ± 1400 yr B.P. and 32 250 ± 1750 yr B.P. respectively. Bison alaskensis is evidently older than the remainder of the fauna as bone from the specimen yielded a radiocarbon date of over 39 900 yr B.P.

Pleistocene mammals from Lost Chicken Creek, Alaska

1980 ◽  
Vol 17 (2) ◽  
pp. 168-198 ◽  
Author(s):  
C. R. Harington
Keyword(s):  
Rangifer Tarandus ◽  
Rangifer Tarandus Caribou ◽  
Radiocarbon Dates ◽  
Mining Site ◽  
Extinct Species ◽  
Equus Asinus ◽  
Wild Ass ◽  
Pleistocene Mammals ◽  
First Time

Ten species of Pleistocene mammals are represented in a collection of fossils from a placer mining site at Lost Chicken Creek. Among these are four extinct species, an extinct subspecies, two species now extinct in the region, and three species that still occupy the area. Bison crassicornis (large-horned bison), Equus (Asinus) lambei (Yukon wild ass), and Rangifer tarandus (caribou) remains are commonest. Equus (Asinus) cf. kiang (kiang-like wild ass) is recorded for the first time from Alaska.These mammals seem to have occupied a cool steppe-like grassland during late Wisconsin time. Bones of horse, wapiti, bison, and helmeted muskox (Symbos) have yielded radiocarbon dates between 27 000 and 10 000 years BP. The dated bison bone was modified by man, indicating that people were present, and probably hunting and butchering bison, in easternmost Alaska at the close of the Wisconsin glaciation.

scholarly journals Physical Research Laboratory Radiocarbon Date List II

Radiocarbon ◽  
1977 ◽  
Vol 19 (2) ◽  
pp. 229-236
Author(s):  
D P Agrawal ◽  
R V Krishnamurthy ◽  
Sheela Kusumgar ◽  
R K Pant
Keyword(s):  
Research Laboratory ◽  
San Diego ◽  
Radiocarbon Date ◽  
Indian Coast ◽  
Physical Research Laboratory ◽  
Radiocarbon Dates ◽  
Physical Research ◽  
First Time

Presented below are dates from some important archaeologic and Quaternary sites. For the first time, a large number of dates have been reported here on the eustatic changes on the Eastern Indian coast. All dates are based on τ1/2 — 5568 yr; to convert the radiocarbon dates for archaeological samples into ad/bc scale, 1950 has been used as base year as per resolution passed at the Ninth International Radiocarbon Conference, San Diego, 1976. The dates are not corrected for 13C fractionation.

Paleopathology: Exostoses of the Third Metacarpal in Pleistocene Horses from the Yukon Territory

1975 ◽  
Vol 12 (6) ◽  
pp. 1053-1058 ◽  
Author(s):  
L. P. E. Choquette ◽  
C. R. Harington ◽  
J. Archibald
Keyword(s):  
Late Pleistocene ◽  
Yukon Territory ◽  
The Other ◽  
Middle Pleistocene ◽  
The Third ◽  
Equus Asinus ◽  
Wild Ass

Two third metacarpals from extinct Yukon Pleistocene horses display pathological exostoses. One specimen is from the Yukon wild ass (Equus (Asinus) lambei) of probable late Pleistocene age; the other is from a large horse like Equus (Plesippus) verae, which may be of early middle Pleistocene age or somewhat later.

New Light on the Midland Discovery

1959 ◽  
Vol 25 (1) ◽  
pp. 66-78 ◽  
Author(s):  
Fred Wendorf ◽  
Alex D. Krieger
Keyword(s):  
Small Mammals ◽  
Radiocarbon Date ◽  
High Plains ◽  
Faunal Assemblage ◽  
Southern High Plains ◽  
Stratigraphic Sequence ◽  
Radiocarbon Dates ◽  
Cultural Events ◽  
Animal Bones

AbstractAdditional excavation in 1955 confirmed the previously reported stratigraphic sequence at Midland, Texas. Within the gray sand, which had yielded a fragmentary human calvarium, there were found additional flint flakes, burned rocks, and animal bones. Besides several small mammals, a four-horned antelope (probably Capromeryx) was present in the gray sand; horse bones occurred in the gray sand and overlying red sand. These finds make the two radiocarbon dates published in the 1955 Midland report, giving an age of about 7000 years to the gray sand, even less acceptable than previously thought. Experimental dating by the uranium daughter products technique suggests an age of about 20,000 years for the gray sand, somewhat excessive in terms of cultural correlations although supported by a single radiocarbon date and not unreasonable for the faunal assemblage. Ten radiocarbon dates from the Midland, Blackwater Draw, Lubbock Lake, and Plainview sites are discussed in terms of three possible correlations of the geological, climatic, faunal, and cultural events in the Southern High Plains.

New Complexities in Zoogeography and Taxonomy of the Pygmy Whitefish (Prosopium coulteri)

1972 ◽  
Vol 29 (12) ◽  
pp. 1772-1775 ◽  
Author(s):  
C. C. Lindsey ◽  
W. G. Franzin
Keyword(s):  
River System ◽  
Yukon Territory ◽  
Hudson Bay ◽  
The South ◽  
Bristol Bay ◽  
River Drainage ◽  
Bay Area ◽  
First Time ◽  
Mackenzie River

Pygmy whitefish (Prosopium coulteri) are recorded for the first time from the Peel–Mackenzie river drainage (Elliott Lake, Yukon Territory) and from the Hudson Bay drainage (Waterton Lakes, Alberta, in the South Saskatchewan–Nelson river system). The morphology of specimens from both localities contradicts the previously known pattern of a southeastern "low-rakered" and a northwestern "high-rakered" form (with the two forms occurring sympatrically in some lakes of the Bristol Bay area). Specimens from Elliott Lake, the most northerly known locality, resemble the southeastern form and those from Waterton Lakes the northwestern form. Both Waterton and Elliott lakes lie close to unglaciated refugia, suggesting that the species may have survived Wisconsin glaciation and diverged in several different watersheds.

The sequence and correlation of Early Ordovician (Arenig) graptolite faunas in the Richardson Trough and Misty Creek Embayment, Yukon Territory and District of Mackenzie, Canada

2006 ◽  
Vol 43 (12) ◽  
pp. 1791-1820 ◽  
Author(s):  
D E Jackson ◽  
A C Lenz
Keyword(s):  
Northwest Territories ◽  
Deep Water ◽  
Yukon Territory ◽  
Early Ordovician ◽  
The Road ◽  
Bedded Chert ◽  
First Occurrence ◽  
Mackenzie Mountains ◽  
First Time

Four graptolite biozones are recorded from the Arenig portion of the Road River Group in the Richardson and Mackenzie mountains in the Yukon and Northwest Territories. In ascending order, these zones are Tetragraptus approximatus, Pendeograptus fruticosus, Didymograptus bifidus, and Parisograptus caduceus australis (new). The Castlemainian stage may be represented by nongraptolitic massive bedded chert. The Arenig–Llanvirn boundary is drawn below the first occurrence of Undulograptus austrodentatus. Fifty-four graptolite taxa are present, and 16 of these species and subspecies are recorded for the first time in this deep-water biotope, namely, Didymograptus? cf. adamantinus, D. asperus, D. dilatans, D. cf. kurcki, D. validus communis, Holmograptus aff. leptograptoides, H. sp. A, Isograptus? sp. nov. A, I. ? dilemma, Keblograptus geminus, Pseudisograptus manubriatus harrisi, Ps. m. koi, Ps. m. janus, Ps. cf. tau, Xiphograptus lofuensis, and Zygograptus cf. abnormis.

scholarly journals Evaluating Bayesian radiocarbon-dated event-count [REC] models for the study of long-term human and environmental processes

2020 ◽  
Author(s):  
William Christopher Carleton
Keyword(s):  
Forest Fires ◽  
Simulated Data ◽  
Radiocarbon Date ◽  
Radiocarbon Dates ◽  
New Class ◽  
Environmental Processes ◽  
Growth Decline ◽  
Marine Ingression ◽  
Event Times

Chronological uncertainty complicates attempts to use radiocarbon dates as proxies for processes like human population growth/decline, forest fires, and marine ingression. Established approaches involve turning databases of radiocarbon-date densities into single summary proxies that cannot fully account for chronological uncertainty. Here, I use simulated data to explore an alternate Bayesian approach that instead models the data as what they are, namely radiocarbon-dated event-counts. The approach involves assessing possible event-count sequences by sampling radiocarbon date densities and then applying MCMC to estimate the parameters of an appropriate count-based regression model. The regressions based on individual sampled sequences were placed in a multilevel framework, which allowed for the estimation of hyperparameters that account for chronological uncertainty in individual event times. Two processes were used to produce simulated data. One represented a simple monotonic change in event-counts and the other was based on a real palaeoclimate proxy record. In both cases, the method produced estimates that had the correct sign and were consistently biased toward zero. These results indicate that the approach is widely applicable and could form the basis of a new class of quantitative models for use in exploring long-term human and environmental processes.

scholarly journals THE DOMESTICATED DONKEY:II -TYPES AND BREEDS

2012 ◽  
Vol 2 ◽  
pp. 81
Author(s):  
Orhan Yilmaz ◽  
Keyword(s):  
Wild Ancestor ◽  
Equus Asinus ◽  
The Family ◽  
Wild Ass ◽  
African Wild Ass

In this study many types and breeds were revised including wild donkeys and domestic breeds from various countries of the world.The donkey, or ass, is the smallest species in the family Equidae. Itis known for its exceptionally long ears. The word ‘donkey' refers to the domesticated Equus asinus. The wild ancestor of donkey is equally deemed to be Equus asinus, the African Wild Ass.

Insect faunas of late Devensian and Flandrian age from Church Stretton, Shropshire

1972 ◽  
Vol 263 (852) ◽  
pp. 327-367 ◽  
Keyword(s):  
Pollen Analysis ◽  
Thermal Environment ◽  
Radiocarbon Date ◽  
Radiocarbon Dates ◽  
Number Of Species ◽  
Summer Temperatures ◽  
Zone Ii ◽  
Climatic Optimum ◽  
The Church

Invertebrate faunas consisting mainly of insects, from deposits in the Church Stretton valley, are described and discussed. These deposits fall into two periods: ( a ) Late Devensian, which follows an episode of glaciation and precedes a period of accumulation of frost-shattered gravel fans; and ( b ) Flandrian, which post-dates the gravels and has been placed in the post-Glacial pollen zones VI and VII. The faunas of these two episodes are dealt with separately in Parts I and II respectively. Part I. From two sites in which sequences containing clays, peats and silts were examined five radiocarbon dates are available, the oldest being 13 555 ± 620 years B.P. and the most recent 11 000 ± 200 years B.P. The faunas include a substantial number of species not now found in Shropshire, many not in Britain. Inferences on the changing ecology and thermal environment of the area are drawn from these faunas and are compared with the pollen analytical zones. This comparison shows that, according to the insects, the warmest part of the episode was late zone I, and that zone II (the Allerod), often considered to be the climatic optimum of the period, appears to have been a time of gradually deteriorating summer temperatures. Part II. Deposits from three late Flandrian sites are discussed. Although only one radiocarbon date was obtained, of 8101 ± 138 years B.P., pollen analysis was carried out by Rowlands throughout each sequence and this showed that the earliest deposit, at Little Stretton, dated from zone VI a and at all three localities deposition continued into zone VII b. An examination of the insect assemblages shows that completely different biotopes, from open pasture to dense woodland, were existing side by side in the Church Stretton valley in late Flandrian time. Summer temperatures at least as high as those of today are inferred. The possibility exists that during the period represented here the climate was even warmer than that of the present but until more information is available it is not possible to be more definite on this point.

South American Radiocarbon Dates

1951 ◽  
Vol 8 ◽  
pp. 37-49 ◽  
Author(s):  
Junius Bird
Keyword(s):  
Time Span ◽  
Radiocarbon Date ◽  
South American ◽  
Radiocarbon Dates ◽  
Good Basis

The Stratigraphic data on some of the Peruvian samples provide a fairly good basis for evaluating the radiocarbon date measurements in relation to each other. The accompanying chart (Fig. 1) was prepared to clarify what is bound to be tedious reading. On it the plotting of the radiocarbon dates is obvious. The insertion with them of sectional profiles of midden excavations may be confusing, but does show where the tested material was found. In one instance (382), although the tested sample did not come from this midden, it belongs chronologically at the level indicated. Knowledge of the nature of the structure between the various layers gives us further means of assessing the results. Thus it is possible to compare the date blocks, as we might call the total plus and minus time span, and to point out which portions cannot be reconciled and are therefore impossible and which portions are improbable. The remaining segments mark the periods within which the actual dates are most likely to fall.

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