Report, Band 13John Hopkins Press, 1937 CONTENTS.--Vol. I (1897)--Vol. II (1898)--Vol. III (1899)--Vol. IV (1902)--Vol. V (1905)--Vol. VI (1906)--Vol. VII (1908)--Vol. VIII (1909)--Vol. IX (1911)--Vol. X (1918)--Vol. XI (1922)--Vol. XII (1928)--Vol. XIII (1937)--Vol. XIV (1941) |
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Seite 70
... observed by the author in the Conestoga limestone in Lancaster County , Pennsylvania , and all gradations between a coarser limestone bed and such lengthened fragments have been traced . The direction of elongation is parallel to the ...
... observed by the author in the Conestoga limestone in Lancaster County , Pennsylvania , and all gradations between a coarser limestone bed and such lengthened fragments have been traced . The direction of elongation is parallel to the ...
Seite 72
... observed these lineations are most valuable in ascertaining their direction . It is , however , essential to determine first the relation between axes of folding , lineations and cleavage planes . In other words , between all these ...
... observed these lineations are most valuable in ascertaining their direction . It is , however , essential to determine first the relation between axes of folding , lineations and cleavage planes . In other words , between all these ...
Seite 128
... observed directly and the 20-30 mile gap must be bridged by other means . Persistent structures which can be recognized over a large territory and which transgress formational bound- aries regardless of their trend serve the purpose ...
... observed directly and the 20-30 mile gap must be bridged by other means . Persistent structures which can be recognized over a large territory and which transgress formational bound- aries regardless of their trend serve the purpose ...
Inhalt
Preface | 25 |
Economic Significance of Detailed Structural Investigations | 31 |
Structures in Igneous Rocks | 36 |
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abundant amphibolite amygdules anticlines aplite axes of folding axis Baltimore gabbro Baltimore gneiss banding bedding biotite Bridge canal Chattolanee dome Chesapeake chlorite cleavage planes Conowingo Dam County Creek cross joints Crosswicks clay crystals deformation Delaware Deposit granodiorite complex diagrams dikes direction east Englishtown Englishtown sand epidote exposures fault feet feldspar flow cleavage flow lines flow structures foliation fossils fracture cleavage gabbro geologic Glenarm Glenarm Series grains granite porphyry granodiorite hornblende igneous rocks inclusions intrusive Jersey lamprophyre linear structures localities marble Marshalltown Marshalltown formation Maryland massive metamorphism metamorphosed microscope mile minerals Mount Laurel Mount Laurel sand northeast occur orientation parallel pegmatite Piedmont planar Plate pluton Port Deposit Port Deposit granodiorite primary quarry quartz diorite quartzite recrystallization region relation schist schistosity sediments Setters formation shear specimen strike Susquehanna River syncline Towson dome transect unconformity volcanics wall rock Wissahickon schist Woodstock dome