Bulletin of the Geological Society of America . failure at the crests of broad anticlinalarches^ and so are essentially features due to compression. Unlike manyexponents of the contraction theory, however, he is alive to the import-. FiGURE 9.—Schema cines OeMrges mit Massendefekt (Dotted line represents theoretical surface of norinal gravity.) Kobers figure 21, page 97. ance of isostatic control. Relief features are largely compensated,,mountain ranges standing high by virtue of deficiency in density (figure9). When an orogenetic zone is undergoing folding, more material isforced into the dep
Bulletin of the Geological Society of America . failure at the crests of broad anticlinalarches^ and so are essentially features due to compression. Unlike manyexponents of the contraction theory, however, he is alive to the import-. FiGURE 9.—Schema cines OeMrges mit Massendefekt (Dotted line represents theoretical surface of norinal gravity.) Kobers figure 21, page 97. ance of isostatic control. Relief features are largely compensated,,mountain ranges standing high by virtue of deficiency in density (figure9). When an orogenetic zone is undergoing folding, more material isforced into the depths than above the general surface. There is con-tinual conflict between tangential and vertical forces. If excessive mat-ter is crowded into a zone, sinking will eventually ensue, although acertain degree of overload may be borne for a time. Thus uplift andsubsidence may occur alternately in essentially the same zone throughseveral geologic periods. BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA Vol. 34. pp. 243-252 JUNE 30. 1923 THE ASIATIC AECS ^ BY WILLIAM HEKBERT HOBBS {Read tefore the Society December 28, 1923 CONTENTS Page Eschers definition of bilateral symmetry 24S Assymmetrical arrangement of ranges 243 Views of Ko
Size: 3437px × 727px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectgeology, bookyear1890
