Biography:

In the past James A. Burns has collaborated on articles with David J. Wellenstein. One of their most recent publications is Vertebrate paleontology and the alleged ice-free corridor: The meat of the matter. Which was published in journal Quaternary International.

More information about James A. Burns research including statistics on their citations can be found on their Copernicus Academic profile page.

James A. Burns's Articles: (3)

Vertebrate paleontology and the alleged ice-free corridor: The meat of the matter

AbstractThe existence of a full-glacial, ice-free corridor through western Alberta has been argued for many years. It has been assumed to have existed, notwithstanding a near total lack of evidence, by many in the North American archeological community as a means of explaining the occurrence of ‘early man’ south of the ice in early postglacial time. In the last 15 years, much has been done to fill the knowledge gap (including theories on alternate routes) but there is still no consensus. Quaternary vertebrate fossils from Alberta, accompanied by numerous radiocarbon dates with a clear gap between 21 ka BP and at least 11.6 ka BP, now suggest that Alberta was overridden by ice during an extensive Late Wisconsinan glaciation. Therefore, a full-glacial, ice-free corridor could not have existed. However, much of the province could have served as a migration route, northward and southward, both before and after Late Wisconsinan glaciation. The preglacial passage could not have been a ‘corridor’ because numerous megafaunal remains and conifer wood, from numerous localities, with finite dates from ca. 43 ka to 21 ka BP, indicate extensive, ice-free conditions. Similarly, a Late Pleistocene corridor—critically appraised from the standpoints of vertebrate paleontology and archeology—is irrelevant because, by the time human migrants arrived in southern Alberta, less than 11 ka BP, the ice had been in retreat for well over 1000 years. Relative to human influx, the continuing use of the term ‘corridor’, with its connotation of a narrow or restricted passage, seems inappropriate.

Office-Based Procedures for the Diagnosis and Treatment of Laryngeal Pathology

SummaryIntroductionSince the development of distal chip endoscopes with a working channel, diagnostic and therapeutic possibilities in the outpatient clinic in the management of laryngeal pathology have increased. Which of these office-based procedures are currently available, and their clinical indications and possible advantages, remains unclear.Material and MethodsReview of literature on office-based procedures in laryngology and head and neck oncology.ResultsFlexible endoscopic biopsy (FEB), vocal cord injection, and laser surgery are well-established office-based procedures that can be performed under topical anesthesia. These procedures demonstrate good patient tolerability and multiple advantages.ConclusionOffice-based procedures under topical anesthesia are currently an established method in the management of laryngeal pathology. These procedures offer medical and economic advantages compared with operating room-performed procedures. Furthermore, office-based procedures enhance the speed and timing of the diagnostic and therapeutic process.

China Bowl Cave: An Early-Middle Holocene non-analog faunule from Grand Rapids, central Manitoba, Canada

AbstractChina Bowl, a small vadose cave in the northern Interlake Region of Manitoba, Canada (53+° N, 99+° W), yielded the first recorded cave assemblage from central Manitoba—an Early-Middle Holocene vertebrate faunule dating to 7715 rcy BP (8500 cal y BP). The faunule, comprising mainly small mammals and amphibians, suggests an open taiga punctuated by mixed groves of trees on drier uplands interspersed with low-lying wetlands in an area occupied only a few centuries previously by proglacial Lake Agassiz. Identified elements include 3368 teeth derived from 17 small mammalian species, most of which are today locally sympatric taxa. This late, non-analog fauna, which includes Bison sp. indet., also features collared lemming (Dicrostonyx, perhaps D. richardsoni) which is now disjunct from the China Bowl locality by some 400–500 km to the north. The early postglacial, post-Agassiz occurrence of Dicrostonyx in the northern Interlake supports hypotheses about (Richardson's?) collared lemming still recolonizing northward from a refugium south of the late-Wisconsin Glacial Maximum (LGM) limits as ice and Lake Agassiz shorelines retreated. More than 3800 amphibian bones were also recovered, along with a few snake and fewer avian remains.

Advertisement
Join Copernicus Academic and get access to over 12 million papers authored by 7+ million academics.
Join for free!

Contact us