A synthesis of recent and previous studies of the Morrison Formation and related beds, in the context of a conceptual climatic/hydrologic framework, permits reconstruction of the Late Jurassic dinosaurian ecosystem throughout the Western Interior of the United States and Canada. Climate models and geologic evidence indicate that a dry climate persisted in the Western Interior during the Late Ju...

The waters in the Eurasian Basin are conditioned by the confluence of the boundary flow of warm, saline Fram Strait water and cold low salinity water from the Barents Sea entering through the St. Anna Trough. Hydrographic sections obtained from RV Polarstern during the summer of 1996 (ACSYS 96) across the St. Anna Trough and the Voronin Trough in the northern Kara Sea and across the Nansen, Amu...

Introduction: Many impact basins on the Moon are filled with extensive mare basalts [1]. This obscures a) the primary structure of fresh basin interiors, including the nature and distribution of impact melts, and b) the nature of the early stages of the filling of basins with mare basalts. In contrast, the interior of the Orientale basin, the youngest and most well-preserved large basin on the ...

This study reconsiders the previous biostratigraphic settings for Asmari Formation in eastern Zagros Basin (Fars Basin). The results imply that Rupelian is identified by total range zone of Nummulites species (N. vascus, N. fichteli, intermedius). occurrence Archaias kirkukensis, A. hensoni, and asmaricus before disappearance current even co-occurrence hensoni with mentioned prevents use recent...

The configuration and timing of the Arabia-Eurasia continental collision, part broader Alpine-Himalayan collisional system, remains controversial. We conducted sandstone petrology, detrital zircon U-Pb-Hf isotopic trace element analysis, Cr-spinel electron microprobe geochemical analysis samples from Paleocene to Miocene peripheral foreland strata in interior Fars, southern Iran. These data wer...

Impact craters on planetary bodies transition with increasing size from simple, to complex, to peak-ring basins and finally to multi-ring basins. Important to understanding the relationship between complex craters with central peaks and multi-ring basins is the analysis of protobasins (exhibiting a rim crest and interior ring plus a central peak) and peak-ring basins (exhibiting a rim crest and...

Introduction: Since its discovery during the first flyby of the MESSENGER spacecraft, the origin of Pantheon Fossae (PF), a complex structure consisting of radial graben in the center of the Caloris Basin, Mercury, has been intensely debated. Several studies looked at the larger context for its formation, where three different formation theories have been suggested, i.e. basin-interior uplift [...

In this article, we study the global dynamics of a discrete two-dimensional competition model. We give sufficient conditions on the persistence of one species and the existence of local asymptotically stable interior period-2 orbit for this system. Moreover, we show that for a certain parameter range, there exists a compact interior attractor that attracts all interior points except Lebesgue me...

Introduction: Sample return from the huge South Pole-Aitken basin is one of the highest priority science missions recommend by the NRC/NAS for solar system exploration by NASA’s New Frontiers program, second only to Kuiper Belt/Pluto exploration [1]. The envisioned SPA mission is to address several key science issues concerning early evolution of solid bodies in the solar system. Since the Moon...