A new Late Cretaceous paleomagnetic pole from the Adel Mountains, west central Montana

1991 ◽  
Vol 96 (B1) ◽  
pp. 317 ◽  
Author(s):  
Jay A. Gunderson ◽  
Steven D. Sheriff
Keyword(s):  
Late Cretaceous ◽  
Paleomagnetic Pole ◽  
West Central ◽  
Central Montana

Zircon U-Pb age of the Pescadero felsite: A Late Cretaceous igneous event in the forearc, west-central California Coast Ranges

2011 ◽  
Vol 123 (7-8) ◽  
pp. 1497-1512 ◽  
Author(s):  
W. G. Ernst ◽  
U. C. Martens ◽  
R. J. McLaughlin ◽  
J. C. Clark ◽  
D. E. Moore
Keyword(s):  
Late Cretaceous ◽  
California Coast ◽  
Central California ◽  
West Central ◽  
Coast Ranges ◽  
California Coast Ranges

Late Cretaceous paleogeography of the Antarctic Peninsula: New paleomagnetic pole from the James Ross Basin

2019 ◽  
Vol 91 ◽  
pp. 131-143 ◽  
Author(s):  
Florencia Milanese ◽  
Augusto Rapalini ◽  
Sarah P. Slotznick ◽  
Thomas S. Tobin ◽  
Joseph Kirschvink ◽  
...  
Keyword(s):  
Antarctic Peninsula ◽  
Late Cretaceous ◽  
Paleomagnetic Pole ◽  
The Antarctic

The Age of Glacier Peak Tephra in West-Central Montana

1984 ◽  
Vol 21 (1) ◽  
pp. 36-41 ◽  
Author(s):  
Peter J. Mehringer ◽  
John C. Sheppard ◽  
Franklin F. Foit
Keyword(s):  
Electron Microprobe ◽  
Major Element ◽  
Late Summer ◽  
Volcanic Glass ◽  
Late Glacial ◽  
Major Element Chemistry ◽  
West Central ◽  
Ash Layer ◽  
Central Montana ◽  
Lake Deposits

At Sheep Mountain Bog, near Missoula, Montana, a late-glacial tephra, that probably fell in late summer, is preserved as an 8-mm-thick graded bed overlain by another 8 mm of redeposited ash mixed with lake deposits. Sediment surrounding the ash was 14C dated to about 11,200 yr B.P. Electron-microprobe analyses of the volcanic glass and hornblende phenocrysts from this ash layer indicate that they are similar in major-element chemistry to those of Glacier Peak layer G previously considered to be about 12,000 yr old or older.

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