Now showing items 21-30 of 242
The distribution of thorium, uranium, and potassium in a Pennsylvanian weathering profile and the Mancos Shale
The purposes of this investigation were to determine the effect of chemical weathering on the distribution of thorium and uranium in a single weathering profile, and to investigate the distribution of these elements in a ...
Major and trace element compositions and strontium, neodymium, and lead isotopic ratios of late Cenozoic mafic lavas from the northern Basin and Range
During the late Cenozoic mafic lavas were emplaced contemporaneously with Basin and Range extension near Battle Mountain, Nevada. They display wide ranges in major and trace elements contents and Sr, Nd, and Pb ratios. The ...
Tertiary geology of the Quebrada Huaricangana area, East Pisco Basin, southern Peru: Late Paleogene to Neogene transgressive sedimentation within a forearc basin
Clastic packages studied in the southern East Pisco Basin represent the transgressive Late Eocene to earliest Oligocene Paracas Group, with questionable presence of the latest Oligocene to Early Miocene Chilcatay formation. ...
A geological and geophysical investigation of sedimentation and recent glacial history in the Gerlache Strait region, Graham Land, Antarctica
Piston cores, bottom grabs, and single-channel seismic data acquired during Deep Freeze/USARP cruises have been used to examine sedimentation and recent climatic history in the bays and fjords of the Gerlache Strait region ...