Now showing items 1-10 of 13
THE IONOSPHERE OF VENUS
General chemical composition of Precambrian crust in the Llano Uplift, central Texas
Many investigations have been made of the late Proterozoic crystalline rocks in the Llano Uplift, central Texas. No comprehensive chemical treatment of this shield area, however, has as yet been reported. Published chemical ...
Sedimentary facies and trace fossils in the Eocene Delmar Formation and Torrey Sandstone, California
The Delmar Formation and Torrey Sandstone were studied in seacliff outcrops at Solana Beach, about 15 km north of San Diego. There, they represent lagoonal and barrier bar or shoal deposits, respectively. Five subfacies ...
Quaternary deep-sea lebensspuren and their relationship to depositional environments in the Caribbean Sea, the Gulf of Mexico, and the eastern and central North Pacific Ocean
Traces of marine benthos provide evidence of biological activity in the deep sea, even where few animals exist. Traces are not restricted to major ocean basins but some restriction to water depth does occur. The greatest ...
Petrochemical study of the Clarno Group: Eocene-Oligocene continental margin volcanism of north-central Oregon
The Clarno Group is a calcalkaline volcanic association developed upon the American plate margin in central Oregon during Eocene-Oligocene time in response to eastward subduction of oceanic terrain beneath western North ...