New and Revised Stratigraphic Names in the Santa Rita Mountains of Southeastern Arizona PDF Download
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Author: Harald Drewes Publisher: ISBN: Category : Geology Languages : en Pages : 24
Book Description
Recent work provides the basis for establishing a stratigraphic column in the Santa Rita Mountains of Santa Cruz and Pima Counties of southeastern Arizona. Thirteen formations of this column are here defined and one is revised. One new formation is a Precambrian granodiorite. Ten new formations are Mesozoic units that include plutonic, volcanic, and continental sedimentary rocks. The revised formation is the Upper Cretaceous Fort Crittenden Formation of Stoyanow (1949), dominantly a sedimentary unit. Two new formations are volcanic and sedimentary rocks of Tertiary age. Many radiometric dates supplement the sparse fossil record in corroborating or redefining the ages that had been assigned to many units on the basis of their geologic relations and in establishing the ages of other units.
Author: Harald Drewes Publisher: ISBN: Category : Geology Languages : en Pages : 24
Book Description
Recent work provides the basis for establishing a stratigraphic column in the Santa Rita Mountains of Santa Cruz and Pima Counties of southeastern Arizona. Thirteen formations of this column are here defined and one is revised. One new formation is a Precambrian granodiorite. Ten new formations are Mesozoic units that include plutonic, volcanic, and continental sedimentary rocks. The revised formation is the Upper Cretaceous Fort Crittenden Formation of Stoyanow (1949), dominantly a sedimentary unit. Two new formations are volcanic and sedimentary rocks of Tertiary age. Many radiometric dates supplement the sparse fossil record in corroborating or redefining the ages that had been assigned to many units on the basis of their geologic relations and in establishing the ages of other units.
Author: Harald Drewes Publisher: ISBN: Category : Geology Languages : en Pages : 92
Book Description
Additional title page description: A description of seven thick sequences of volcanic and sedimentary rocks and an interpretation of the sporadically active continental environments in which they were deposited.
Author: Harald Drewes Publisher: ISBN: Category : Geochemical prospecting Languages : en Pages : 80
Book Description
Trace elements in alluvium and altered rock, recognized by geologic investigation previously reported, indicate some areas of potential economic interest along faults or near ore-associated intrusives.
Author: Harald Drewes
Author: Harald Drewes
Author: Harald Drewes
Author: Harald Drewes
Author: 
Author: 
Author: Geological Survey (U.S.)
Author: George Vincent Cohee
Author: United States. Superintendent of Documents
Author: United States. Superintendent of Documents
Author: