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 53
... AXES OF FOLDING The most important element is the axis of a fold . Its position is measured in the field with compass and clinometer and then its horizontal projection platted on maps . The horizontal projection is the intersection ...
... AXES OF FOLDING The most important element is the axis of a fold . Its position is measured in the field with compass and clinometer and then its horizontal projection platted on maps . The horizontal projection is the intersection ...
Seite 59
... axes or a plane or any other linear or planar elements or their combination . Details of this type of investigation are discussed on pages 82-93 . SYSTEMS OF FOLDS Single folds are rare and occur only in non - metamorphic regions ; as ...
... axes or a plane or any other linear or planar elements or their combination . Details of this type of investigation are discussed on pages 82-93 . SYSTEMS OF FOLDS Single folds are rare and occur only in non - metamorphic regions ; as ...
Seite 74
... axes of the folds pitch the dip of cross joints become gentler ; with horizontal axes the cross joints are vertical . Steep axes necessitate very gently dipping joints and vertical axes , which are rare , are accompanied by flat cross ...
... axes of the folds pitch the dip of cross joints become gentler ; with horizontal axes the cross joints are vertical . Steep axes necessitate very gently dipping joints and vertical axes , which are rare , are accompanied by flat cross ...
Inhalt
Page | 19 |
Preface | 25 |
Primary Elements in Igneous Rocks of the Piedmont | 37 |
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abundant amphibolite amygdules anticlines aplite axes of folding axis Baltimore gabbro Baltimore gneiss banding bedding biotite Bridge 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 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 Upper Cretaceous volcanics wall rock Wissahickon schist Woodstock dome