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The Adirondack Mountains--A Section of Deep Proterozoic Crust: Montreal, Canada to Albany, New York June 30 - July 8, 1989, Volume T164

The Adirondack Mountains--A Section of Deep Proterozoic Crust: Montreal, Canada to Albany, New York June 30 - July 8, 1989, Volume T164

Steven R. Bohlen, John W. Valley, Philip R. Whitney, James D. Carl, William de Lorraine, Yngvar W. Isachsen, James M. McLelland, James F. Olmsted

ISBN: 978-1-118-66815-3

Mar 2013, American Geophysical Union

63 pages

Select type: O-Book

Description

Published by the American Geophysical Union as part of the Field Trip Guidebooks Series, Volume 164.

The Adirondack Mountains of northern New York State are underlain by Middle Proterozoic (Neohelikian) rocks of the Grenville Province, exposed in a breached Cenozoic dome. This trip consists of a traverse from upper amphibolite-facies metavolcanic and metasedimentary rocks in the northwest lowlands, southeastward across a major zone of high ductile strain, into granulite-facies plutonic rocks of the Adirondack highlands, which record depths of 25–30 km in a ooubly-thickened continental crust retween 1.1 and 1.0 Ga. This guidebock is divided into two major sections. The first is an overview of Adirondack geology, with sections on regional setting, stratigraphy, igneous rocks, metamorphism, structure, geochronolgy, stable isotopes, economic geology, and neotectonics, and a specutlative outline of the geologic history of the region. The second section is a road log, with extended descriptions for those stops that are the subject of current or recent research. There are 38 numbered stops on the planned route, in addition to 8 lettered alternate stops that will be visited in time permits.

Overview of Adirondack Geology

Introduction

Regional setting

Stratigraphy and sedimentary enviromnent

Northwest lowlands

Highlands

Igneous rocks

Northwest lowlands

Highlands

Metamorphism

Pressure-Temperature-time

Metamorphic fluids

Structure

Northwest lowlands

Carthage-colton zone

Highlands

Brittle Structure

Geochronology

Stable Isotopes

Economic Geology

Northwest lowlands

Highlands

Neotectonics

Geologic History

Road Log

Day 1

Day 2

Day 3

Day 4

Day 5

Day 6

Day 7

Day 8

Acknowledgements

REFERENCES

TABLE OF CHEMICAL ANALYSES