Author: R. Wade HolderPublisher:
ISBN:
Category : Geology
Languages : en
Pages : 112
Book Description
An Introduction to the Geology of the Southeast 1/4 of the Seventeenmile Mountain Quadrangle, Ferry County, Washington
Author: R. Wade HolderPublisher:
ISBN:
Category : Geology
Languages : en
Pages : 112
Book Description
Revised Geology and Mineral Potential of the Colville Indian Reservation, Washington, 1984
Author: Publisher:
ISBN:
Category : Colville Indian Reservation (Wash.)
Languages : en
Pages : 104
Book Description
Geology of the SE 1/4 of the Twin Lakes Quadrangle, Ferry County, Washington
Author: Corey Y. FullmerPublisher:
ISBN:
Category : Geology
Languages : en
Pages : 146
Book Description
"The Covada Group, which is exposed in the Twin Lakes quadrangle, is composed of intensely folded and faulted eugeoclinal metasediments. Complexly interfingering and intergrading units of graywacke, phyllite, quartzite, black slate and greenstone are the main lithologies. Eastward dipping isoclinal folds and normal listric faults are the dominant structures. The limiting age of the Covada Group is uncertain, but part of it is considered Lower Ordovician. However, more intensely metamorphosed units may include rocks as young as Triassic, or possibly as old as Precambrian. Crustal shortening during Late Triassic to Middle Jurassic thrust Western Province eugeoclinal strata onto Eastern Province miogeoclinal rocks of comparable age. This east-west compressional phase severely deformed the rocks of the Covada Group by condensing them into a series of large-scale isoclinal folds that generally strike North 10° West to North 30° East. Dips are generally steep and often vertical. Evidence suggests that the Covada Group rocks are suspect in origin, and were subsequently swept against, and accreted to, the North America Cordilleran margin sometime during the Middle Mesozoic. In the Western Province, greenschist-facies Covada Group rocks are separated from sillimanite-facies metamorphic rocks of the Kettle Gneiss dome by a low-angle fault. Evidence suggests that the core of the Kettle dome was emplaced by Post-Eocene regional doming. The low-angle fault appears to be the result of either folding of an older flat thrust (similar to the type that brought the eugeoclinal block in contact with the miogeoclinal block), or the eugeoclinal cover rocks became decoupled from the rising Kettle dome, and were transported down slope, in one consistent direction to the margin, as a result of gravity sliding"--Document.
The Nature and Origin of Cordilleran Magmatism
Author: J. Lawford AndersonPublisher: Geological Society of America
ISBN: 0813711746
Category : Science
Languages : en
Pages : 428
Book Description
Geology of the Republic Quadrangle and a Part of the Aeneas Quadrangle, Ferry County, Washington
Author: Siegfried MuessigPublisher:
ISBN:
Category : Geology
Languages : en
Pages : 148
Book Description
Geology of an area in northeastern Washington that contains important gold-silver deposits and a major structural feature, the Republic graben.
Geology of the Stensgar Mountain Quadrangle, Stevens County, Washington
Author: Geological Survey (U.S.)Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Geology and Petrology of the Intrusive Rocks East of the Republic Graben in the Republic Quadrangle, Ferry County, Washington
Author: Grace A. McCarley HolderPublisher:
ISBN:
Category : Geology
Languages : en
Pages : 174
Book Description
Geology of the Republic Quadrangle and a Part of the Aeneas Quadrangle, Ferry County, Washington
Author: Siegfried MuessigPublisher:
ISBN:
Category : Geology
Languages : en
Pages : 254
Book Description
Geology of the Curlew Quadrangle, Ferry County, Washington : a study of metamorphic, intrusive, and volcanic rocks, geologic structure, and mineral deposits
Author: Raymond Laurence ParkerPublisher:
ISBN:
Category :
Languages : en
Pages : 95
Book Description
Geology of the Chewelah Mountain Quadrangle, Stevens County, Washington
Author: Lorin D. ClarkPublisher:
ISBN:
Category : Geology
Languages : en
Pages : 6
Book Description