Home eBooks Download › geochronology of older precambrian rocks in gila county arizona

Geochronology Of Older Precambrian Rocks In Gila County Arizona

Download Geochronology Of Older Precambrian Rocks In Gila County Arizona PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Geochronology Of Older Precambrian Rocks In Gila County Arizona book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page

Geochronology Of Older Precambrian Rocks In Gila County Arizona

DOWNLOAD
Author : Donald Everett Livingston
language : en
Publisher:
Release Date : 1969

Geochronology Of Older Precambrian Rocks In Gila County Arizona written by Donald Everett Livingston and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1969 with Geological time categories.

A sequence of Older Precambrian volcanic and sedimentary rocks more than 15,000 feet thick occurs in the Blackjack Mountains and White Ledges, 20 miles north of Globe, Arizona. This sequence consists of (from older to younger) the Redmond formation (acidic volcanic rocks) and the Hess Canyon group (clastic sedimentary rocks). The Hess Canyon group is subdivided into: the White Ledges formation (interbedded quartzites and argillaceous rocks); the Yankee Joe formation (argillaceous strata with interbedded graywackes and arkoses); and the Blackjack formation (argillaceous quartzites). These rocks have been intruded by the Ruin Granite (a porphyritic quartz monzonite) and subsequently eroded to approximately the present level of exposure prior to the deposition of the Younger Precambrian Apache Group. The unconformity between the Older and Younger Precambrian strata is well exposed at Butte Creek north of Haystack Butte. Diabase has intruded the Blackjack formation, the Ruin Granite and the Apache Group. No Paleozoic or Mesozoic rocks are known to occur within the surveyed area. Sediments and volcanic and sedimentary rocks of Tertiary and Quaternary age partly conceal the older rocks. The Hess Canyon group can be correlated with the Deadman Quartzite, Maverick Shale, and Mazatzal Quartzite of the Mazatzal Mountains (Wilson 1939a) and also the Houden Formation of the Diamond Butte Quadrangle (Gastil 1958). Whole rock Rb-Sr dating indicates an age of 1,510 ± m.y. for the Redmond formation. Isotopic dating of the Ruin Granite near the Blackjack Mountains and of the granitic rocks intruded the Mazatzal Quartzite of Four Peaks in the southern Mazatzal Mountains indicates that the Mazatzal Orogeny (the Mazatzal Revolution of Wilson, 1939a) occurred 1,425 to 1,380 m.y. ago in central Arizona. This orogeny followed the deposition of the Mazatzal Quartzite and the Hess Canyon group, terminating older Precambrian time in Arizona and was followed by the deposition of the Younger Precambrian Apache Group. Isotopic dating of volcanic metamorphic and plutonic rocks in the Pinal and Tortilla Mountains and near Roosevelt Dam on the Salt River indicate that portions of the Pinal Schist in the type locality are greater than 1,730 m.y. old and that these rocks have experienced a complex series of events in Older Precambrian times. The Madera Diorite of Ransome (1903) consists of rocks 1,730 ± 30 m.y. old as well as rocks about 1,500 m.y. old. The Older Precambrian igneous rocks in this part of Arizona appear to have developed from material similar in Rb to Sr ratio to average shallow continental crust. These rocks formed during the interval 1,730 to 1,370 m.y. ago. The continental crust in this region probably originated no earlier than about 1,800 m.y. ago. Igneous rocks younger than 1,370 m.y. have not been derived soley from average shallow crustal material.

Older Precambrian Rocks Of The Diamond Butte Quadrangle Gila County Arizona

DOWNLOAD
Author : R. Gordon Gastil
language : en
Publisher:
Release Date : 1958

Older Precambrian Rocks Of The Diamond Butte Quadrangle Gila County Arizona written by R. Gordon Gastil and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1958 with Geology categories.

Younger Precambrian Geology In Southern Arizona

DOWNLOAD
Author : Andrew Fletcher Shride
language : en
Publisher:
Release Date : 1967

Younger Precambrian Geology In Southern Arizona written by Andrew Fletcher Shride and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1967 with Geology categories.

Stratigraphic lithologia, and structural features of Younger Precambrian rocks of southern Arizona as a basis for understanding their paleogeography and establishing their correlation.

Precambrian Conterminous U S

DOWNLOAD
Author : John C. Reed, Jr.
language : en
Publisher: Geological Society of America
Release Date : 1993

Precambrian Conterminous U S written by John C. Reed, Jr. and has been published by Geological Society of America this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Science categories.

This wide-ranging discussion of Precambrian rocks includes contributions from a diverse array of authors actively engaged in investigations of various aspects of U.S. Precambrian geology. Summary discussions by the editors of the five major chapters place these contributions in a logical regional framework.

U S Geological Survey Professional Paper

DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1972

U S Geological Survey Professional Paper written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1972 with Geology categories.

Bibliography Of Theses In Geology 1967 1970

DOWNLOAD
Author : Dederick C. Ward
language : en
Publisher: Geological Society of America
Release Date : 1973

Bibliography Of Theses In Geology 1967 1970 written by Dederick C. Ward and has been published by Geological Society of America this book supported file pdf, txt, epub, kindle and other format this book has been release on 1973 with Dissertations, Academic categories.