Dept. of Geology
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The sedimentology of bedforms to barforms within tidally-influenced fluvial zones (TIFZx): lower Columbia River, OR/WA, USA, and the lower Chehalis River, WA, USA (2017-07-14)The tidally-influenced fluvial zone (TIFZ), or ‘fluvial-tidal’ transition, is an environment characterized by unidirectional fluvial, bidirectional tidal, and oceanic oscillatory currents. TIFZ environments (i.e., deltas ...
Sedimentology of multistorey fluvial sandstones of the Mississippian Cypress Formation, Illinois Basin, USA (2017-07-19)The Cypress Formation (Upper Mississippian) is the most oil-productive unit in the Illinois Basin, USA. In the central part of the basin, the Cypress Formation contains sandstones up to 60 m thick in a northeast-southwest ...
(2017-07-05)The Earth’s solid inner core was formed from crystallization of liquid iron in the fluid outer core as the Earth slowly cools. The understanding of the structure of the inner core, combined with high pressure and temperature ...
(2017-04-24)The differential motion, lateral velocity gradient, and topography of the Earth’s inner core make the temporal change of the core phases’ arrival times observable in waveform doublets, a pair of events happened at the same ...
Petrogenesis of natrocarbonatite at Ol Doinyo Lengai, East Africa—evidence from Fe and U isotope variations (2017-04-25)Ol Doinyo Lengai (ODL), Tanzania, is the only active carbonatite volcano on earth. Cyclical activity that consists of quiescent natrocarbonatite lava flow, explosive silicate eruption and dormancy has been observed throughout ...