Texas Rocks and Minerals, An Amateur’s Guide
BUREAU OF ECONOMIC GEOLOGY
The University of Texas
Austin, Texas
Peter T. Flawn, Director
Guidebook 6
 TEXAS ROCKS AND MINERALS
An Amateur’s Guide
By
ROSELLE M. GIRARD
Sketches by Bill M. Harris
SEAL OF THE UNIVERSITY OF TEXAS
February 1964
Second Printing, April 1972
Third Printing, April 1976
Fourth Printing, May 1979
iii
Contents
Page
Preface vii
Introduction 1
Earth’s outer crust 2
Geologists 2
Time and rock units 2
Geologic map 6
What are rocks and minerals? 7
Chemical elements 7
Minerals 7
Rocks 8
Igneous rocks 9
Extrusive or volcanic igneous rocks 9
Intrusive igneous rocks 9
Sedimentary rocks 10
Soils 10
Sedimentary rock materials in broken fragments 11
Sedimentary rock materials in solution 12
Cementing materials and chemical sediments 12
Sedimentary rocks formed by plants and animals 12
Metamorphic rocks 12
Static metamorphism 13
Contact metamorphism 13
Dynamic metamorphism 14
Occurrence and properties of minerals 14
How minerals occur 14
Crystalline minerals 14
Crystals 14
Imperfect crystals 14
Amorphous minerals 15
Some distinguishing properties of minerals 15
Color 16
Luster 16
Transmission of light 16
Hardness 16
Strea                        
...
                        
BU KİTABI OKUMAK İÇİN ÜYE OLUN VEYA GİRİŞ YAPIN!

                        
Sitemize Üyelik ÜCRETSİZDİR!