Bulletin, Issues 492-495U.S. Government Printing Office, 1911 - Geology |
Contents
Preface | 9 |
Areal geology | 15 |
Map of parts of Stonington and Moosup quadrangles New London | 19 |
Igneous rocks | 21 |
In pocket | 28 |
Effect of the granite intrusion | 32 |
Method of intrusion | 38 |
A Photomicrograph of epidote gneiss B Photomicrograph of part | 40 |
A Photomicrograph of partly saussuritized gabbro B Photomicro | 80 |
A Photomicrograph of moderately mashed gabbro B Photomicro | 88 |
65 | 98 |
Origin of the hornblende schist | 111 |
PetrographyContinued Page | 119 |
33 | 123 |
A Photomicrograph of partly replaced alaskite B Photomicro | 140 |
Summary | 149 |
3 | 43 |
Faulting | 48 |
A Photomicrograph of basic pyroxene hornfels B Dissolution holes | 53 |
Special erosional features | 54 |
Pyroxenic variety | 60 |
PetrographyContinued | 68 |
A Photomicrograph of pseudoporphyritic kinzigite B Specimen | 68 |
Folding inferred from relations of pegmatite and amphibolite sheets | 4 |
June 1915 | 7 |
26 | 13 |
Small fanshaped fold in schist near North Stonington limekiln | 6 |
Simplified plan of gabbro mass showing results of eastward com | 9 |
Black dustlike inclusions in feldspar of gabbro | 15 |