The American Salt-Dome Problems in the Light of the Roumanian and German Salt Domes

摘要: The American salt-dome problems are divisible into two parallel series, the one comprising of description, other theory. solution latter necessity dependent upon former. salt domes consist subcircular stocklike masses salt, capped in most cases by limestone and gypsum-anhydrite, intruded surrounded Pleistocene-Eocene or Eocene-Cretaceous sediments which dip quaquaversally away from core. show certain tendencies to alignment. They occur regions geologic quiescence where there has been no compressive folding. Roumanian groups, Carpathian-Sub-Carpathian, Transylvanian. Carpathian-Sub-Carpathian narrow, elongated, vertical intrusions Salifere clays, marls along anticlinal axes a thick series Pliocene Miocene sediments. on edge of, immediately front Carpathian sheet overthrust aligned structural, mostly anticlinal, reflect effect tectonics. If difference structural setting is allowed for, closely resemble those America. Their origin usually attributed some phase tangential thrust mountain-building forces. Krejci recently raised strong o jection that theory, advanced tectonic-isostatic theory according tectonic responsible for localization initiation their formation, but weight overlying upthrust Transylvanian Plio-Miocene basin. Although only poorly known, they seem be very similar form domes. subparallel periphery German deposits, definitely sedimentary with well-defined, persistent, characteristic section. One middle members carries marine fossils, potash bearing. On account extensive mining exploration this potash, recognizable section deformation deposits worked out great detail. basis structure complete gradation type space undeformed beds through broad anticlines slightly swollen cores (Strassfurt type), sharp core starting pierce cover (Asse broken End_Page 1227------------------------------ squeezed up between flanks (Leine stocks (Hannoverian type) pluglike mass thousands meters vertically There seemingly can dispute ridges result plastic flow series. Rhenish Hercynian axes. Many at intersection Stille, who presents substantial evidence such Lachman, Arrhenius, Seidl, others argue less conclusively an isostatic upthrust. In view domes, addition what known about it would unreasonable believe not