scholarly journals Evidence for a late glacial advance near the beginning of the Younger Dryas in western New York State: An event postdating the record for local Laurentide ice sheet recession

Geosphere ◽  
2020 ◽  
Author(s):  
Richard A. Young ◽  
Lee M. Gordon ◽  
Lewis A. Owen ◽  
Sebastien Huot ◽  
Timothy D. Zerfas
Keyword(s):  
New York ◽  
New England ◽  
New York State ◽  
Younger Dryas ◽  
Late Glacial ◽  
Discrete Events ◽  
Upper Great Lakes ◽  
Similar Distance ◽  
Glacial Tills ◽  
Glacial Advance

Widespread evidence of an unrecognized late glacial advance across preexisting moraines in western New York is confirmed by 40 14C ages and six new optically stimulated luminescence analyses between the Genesee Valley and the Cattaraugus Creek basin of eastern Lake Erie. The Late Wisconsin chronology is relatively unconstrained by local dating of moraines between Pennsylvania and Lake Ontario. Few published 14C ages record discrete events, unlike evidence in the upper Great Lakes and New England. The new 14C ages from wood in glacial tills along Buttermilk Creek south of Springville, New York, and reevaluation of numerous 14C ages from miscellaneous investigations in the Genesee Valley document a significant glacial advance into Cattaraugus and Livingston Counties between 13,000 and 13,300 cal yr B.P., near the Greenland Interstadial 1b (GI-1b) cooling leading into the transition from the Bölling-Alleröd to the Younger Dryas. The chronology from four widely distributed sites indicates that a Late Wisconsin advance spread till discontinuously over the surface, without significantly modifying the preexisting glacial topography. A short-lived advance by a partially grounded ice shelf best explains the evidence. The advance, ending 43 km south of Rochester and a similar distance south of Buffalo, overlaps the revised chronology for glacial Lake Iroquois, now considered to extend from ca. 14,800–13,000 cal yr B.P. The spread of the radiocarbon ages is similar to the well-known Two Creeks Forest Bed, which equates the event with the Two Rivers advance in Wisconsin.

scholarly journals Supplemental Material: Evidence for a late glacial advance near the beginning of the Younger Dryas in western New York State: An event postdating the record for local Laurentide ice sheet recession

2020 ◽  
Author(s):  
R.A. Young ◽  
et al.
Keyword(s):  
New York ◽  
New York State ◽  
Late Glacial ◽  
Laurentide Ice Sheet ◽  
York State ◽  
Supplemental File ◽  
Glacial Tills ◽  
Material Evidence ◽  
Extended Discussion ◽  
Glacial Advance

An extended discussion relating to the identification of glacial tills at the critical sites in this investigation is provided as a Supplemental File to eliminate any concerns that the exposures might be landslide debris as opposed to primary glacial till. The supplement also speculates as to why the advance in western New York State may not have been obvious in the extensive research published for the St. Lawrence Valley.

scholarly journals Supplemental Material: Evidence for a late glacial advance near the beginning of the Younger Dryas in western New York State: An event postdating the record for local Laurentide ice sheet recession

2020 ◽  
Author(s):  
R.A. Young ◽  
et al.
Keyword(s):  
New York ◽  
New York State ◽  
Late Glacial ◽  
Laurentide Ice Sheet ◽  
York State ◽  
Supplemental File ◽  
Glacial Tills ◽  
Material Evidence ◽  
Extended Discussion ◽  
Glacial Advance

An extended discussion relating to the identification of glacial tills at the critical sites in this investigation is provided as a Supplemental File to eliminate any concerns that the exposures might be landslide debris as opposed to primary glacial till. The supplement also speculates as to why the advance in western New York State may not have been obvious in the extensive research published for the St. Lawrence Valley.

Survey of Daily Newspaper Personnel Shortages

1943 ◽  
Vol 20 (1) ◽  
pp. 112-115
Keyword(s):  
New York ◽  
New England ◽  
New York State ◽  
Daily Newspaper ◽  
York State ◽  
Personnel Shortages

This study was made by the NCPEJ with cooperation of the ANPA, NEA, IDPA, New England Publishers Association, Pennsylvania Newspaper Publishers Association and New York State Publishers Association. It was conducted by Kenneth E. Olson, dean, Medill School of Journalism, and secretary of the NCPEJ, and reported by him to the NCPEJ meeting in Chicago January 8, 1943.

scholarly journals A younger glacial Lake Iroquois in the Lake Ontario basin, Ontario and New York: re-examination of pollen stratigraphy and radiocarbon dating

2020 ◽  
Vol 57 (4) ◽  
pp. 453-463
Author(s):  
C.F.M. Lewis ◽  
T.W. Anderson
Keyword(s):  
New York ◽  
New York State ◽  
Lake Ontario ◽  
Late Glacial ◽  
Glacial Lake ◽  
Lake Basin ◽  
Long Distance ◽  
Small Lake ◽  
Pollen Stratigraphy ◽  
Lake Basins

Revision of palynochronologic and radiocarbon age estimates for the termination of glacial Lake Iroquois, mainly based on a currently accepted younger determination of the key Picea–Pinus pollen transition, shows agreement with recently established constraints for this late glacial event in the Lake Ontario basin at 13 000 cal years BP. The date of emergence or isolation of small lake basins reflects the termination of inundation by glacial lake waters. The increasing upward presence of plant detritus and the onset of organic sedimentation marks the isolation level in the sediments of a small lake basin. The upward relative decline and cessation of pollen from trees such as Pinus, Quercus, and other thermophilous hardwoods that were wind transported long distances from southern areas also mark the isolation of inundated small lake basins by the declining water level of Lake Iroquois as local vegetation grew and local pollen overwhelmed long-distance-transported pollen. Re-examination of data in small lake basins north of Lake Ontario using the above criteria shows that the age range for the termination of Lake Iroquois derived from these data overlaps other age constraints. These constraints are based on a varve-estimated duration of post-Iroquois phases before incursion of the Champlain Sea, a newly discovered late ice advance into northern New York State, and the age of a mastodon at Cohoes, New York. The new age (13 000 cal years BP) for Lake Iroquois termination is significantly younger than the previous estimate of 11 800 14C (13 600 cal) years BP.

Tree macrofossils of Younger Dryas age from Cohoes, New York State, USA

2012 ◽  
Vol 49 (5) ◽  
pp. 671-680 ◽  
Author(s):  
Norton G. Miller ◽  
Carol B. Griggs
Keyword(s):  
New York ◽  
Picea Glauca ◽  
New York State ◽  
Abies Balsamea ◽  
Younger Dryas ◽  
Hudson River ◽  
Growth Responses ◽  
Radiocarbon Dates ◽  
Plant Remains ◽  
American Beaver

Tree macrofossils dating from the middle to end (about 1000 years, ca. 12 600–11 600 cal years BP) of the Younger Dryas chronozone were found in an organic deposit on the southwest side of the Mohawk River, near its junction with the Hudson River in Cohoes, New York, USA. The fossils included substantial wood fragments, associated plant remains, and pollen, which indicate a forest of white spruce ( Picea glauca ), balsam fir ( Abies balsamea ), and tamarack ( Larix laricina ). The presence of white, rather than black ( P. mariana ) or red ( P. rubens ) spruce in the Younger Dryas was probably due to a riparian-type environment, confirmed by its location and American beaver tooth marks on some of the wood fragments. The clusters of wood radiocarbon dates indicate periodic changes in erosion and deposition at the site. One possible but very short decline (temperature reversal?) may be indicated by tree-ring growth, but in general, the ring widths of the trees and their growth responses suggest variable but slowly improving conditions over time, possibly from warming temperatures, before the end of the Younger Dryas.

Cytogéographie de l'Aster cordifolius (Asteraceae : Astereae) au Québec

1989 ◽  
Vol 67 (7) ◽  
pp. 2114-2119
Author(s):  
André Legault ◽  
Luc Brouillet
Keyword(s):  
New York ◽  
New Brunswick ◽  
New England ◽  
New York State ◽  
The West ◽  
York State ◽  
Chromosomal Races ◽  
The One ◽  
Experimental Crosses ◽  
Ecological Differences

The chromosome numbers of 209 individuals of Aster cordifolius L. from ca. 130 localities from the provinces of Quebec and New Brunswick were determined; 122 were diploid and 87, tetraploid. Four populations are mixed, but no triploid was found; experimental crosses beween the two cytotypes failed. Genic exchanges do not appear to exist between the two races, at least not via normal gametes. In Quebec, the two cytotypes are sympatric in the Richelieu valley; west of this area, only tetraploids are found, and east of it, only diploids. This distribution pattern continues the one observed in Ontario, New York State, and New England, where the contact zone is, however, wider. No obvious ecological differences were noted between the two chromosomal races. Postglacial migration on either side of the Appalachian–Adirondack axis, tetraploids to the west and diploids to the east, appears to explain the distribution of cytotypes of A. cordifolius in Quebec.

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