Studies of cleavage in the metasedimentary rocks of the northwest Adirondack Mountains, New York

1949 ◽  
Vol 30 (5) ◽  
pp. 767 ◽  
Author(s):  
A. E. J. Engel
Keyword(s):  
New York ◽  
Adirondack Mountains ◽  
Metasedimentary Rocks

Precise zircon geochronology in the Adirondack Lowlands and implications for revising plate-tectonic models of the Central Metasedimentary Belt and Adirondack Mountains, Grenville Province, Ontario and New York

1999 ◽  
Vol 36 (6) ◽  
pp. 967-984 ◽  
Author(s):  
Hardolph Wasteneys ◽  
James McLelland ◽  
Sydney Lumbers
Keyword(s):  
New York ◽  
Plate Tectonic ◽  
Adirondack Mountains ◽  
Grenville Province ◽  
Metasedimentary Rocks ◽  
Minimum Age ◽  
Single Grain ◽  
Shrimp Zircon ◽  
Shrimp Zircon Dating ◽  
St Lawrence River

New high-precision, single-grain dating of leucogranites from the Adirondack Lowlands, dated previously by multigrain zircon methods at ca. 1416 Ma (Wellesley Island) and ca. 1285-1230 Ma (Hyde School Gneiss), has yielded U-Pb zircon ages of ca. 1172 Ma, identical to that of Rockport granite of the Frontenac terrane. In addition, sensitive high resolution ion microprobe (SHRIMP) zircon dating of the intrusive Antwerp-Rossie suite in the Adirondack Lowlands indicates a maximum emplacement age of ca. 1207+26-11 Ma which fixes a minimum age for deposition of regional metasedimentary rocks that it crosscuts. These results remove apparent chronological discrepancies across the St. Lawrence River, thus expanding the significance of the Rockport granite and Hyde School Gneiss and requiring modification of plate-tectonic models for the Central Metasedimentary Belt and Adirondack Mountains in the interval ca. 1350-1125 Ma.

Performance of Indigenous, Exotic, and Hybrid Strains of Brook Trout (Salvelinus fontinalis) in Waters of the Adirondack Mountains, New York

1981 ◽  
Vol 38 (12) ◽  
pp. 1701-1707 ◽  
Author(s):  
Dwight A. Webster ◽  
William A. Flick
Keyword(s):  
New York ◽  
Brook Trout ◽  
Salvelinus Fontinalis ◽  
Hybrid Vigor ◽  
Superior Performance ◽  
Adirondack Mountains ◽  
Wild Strains ◽  
Early Fall ◽  
Survival And Growth ◽  
Wild Trout

Eleven year-classes of wild, domestic, and wild × domestic hybrid strains of brook trout (Salvelinus fontinalis) were stocked in a 0.19-ha Adirondack pond. Comparative survival and growth were assessed upon drainage in early fall. Rearing native wild strains to maturity in a hatchery, or domestic strains in a natural environment, did not consistently or materially affect survival of progeny, suggesting that superior performance of wild strains was largely inherent. Interstrain hybrids of wild × domestic showed survivals equivalent to the wild parents, but hybrids of two Canadian strains gave evidence of heterosis in both survival and net yield. Supplementary observations in other waters also indicated that one strain (Assinica) may be less adaptable to Adirondack conditions than the other (Temiscamie).Key words: brook trout, wild trout, domesticated trout, interstrain hybrid trout, survival, growth, heterosis, hybrid vigor

Patterns of Mercury Accumulation among Seston in Lakes of the Adirondack Mountains, New York

2009 ◽  
Vol 43 (13) ◽  
pp. 4836-4842 ◽  
Author(s):  
Ryan M. Adams ◽  
Michael R. Twiss ◽  
Charles T. Driscoll
Keyword(s):  
New York ◽  
Mercury Accumulation ◽  
Adirondack Mountains
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