Now showing items 481-490 of 490
The radioactivity, accessory minerals, and possibilities for absolute dating of bentonites
Sixty-three samples of bentonite from the Ordovician and 3 from the Devonian of the eastern United States were collected. Two samples from the Ordovician of Norway, and 4 from the Cretaceous of Wyoming were secured from ...
New mid-Paleozoic ostracodes from western Tennessee
The purpose of this thesis is to contribute to the general knowledge of middle-Paleozoic ostracoda of Tennessee and thus assist directly as well as indirectly in solving some of the problems which confront the paleontologist ...