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pro vyhledávání: '"David N. Gomberg"'
Autor:
William C. Burnett, David N. Gomberg
Publikováno v:
Sedimentology. 24:291-302
Phosphatized limestones from the Pourtales Terrace, Straits of Florida, have undergone fresh-water diagenesis, as shown by several selective petrologic features such as dissolution of aragonitic skeletal material and preservation and recrystallizatio
Autor:
Enrico Bonatti, David N. Gomberg
Publikováno v:
Science. 168:1451-1453
The high-magnesian calcite fraction of a shallow-water carbonate sand was converted to low-magnesian calcite after transport to the deep sea; strontium was also leached from the carbonate. Oxygen isotopic ratios indicate that loss of magnesium and st
Publikováno v:
Science (New York, N.Y.). 162(3849)
Concordia resolution of uranium-lead analyses of zircons from rocks of the Guatemalan Cordillera indicates a period of plutonism, and perhaps metamorphism, in late Paleozoic times (345 +/- 20 million years). Gneisses of the Chuacus Series yield an ag