Over the last 15 years a striking pattern of diversification has been documented in the fossil record of benthic marine invertebrates. Higher taxa (orders) tend to originate onshore, diversify offshore, and retreat into deep-water environments. Previous studies attribute this macroevolutionary pattern to a variety of causes, foremost among them the role of nearshore disturbance in providing opp...

The Significance of the Postcranial Anatomy of the Late Paleozoic Diadectomorph family Limnoscelidae (Tetrapoda, Amniota?) Natalia K. Wideman*1,2 1 California State University San Bernardino, San Bernardino, CA 94222, U.S.A., 2 Museum of Paleontology, Claremont, CA 91711, U.S.A. The postcranial anatomy of the Late Paleozoic Diadectomorph family Limnoscelidae is significant because the Diadectom...

Stratigraphic and sedimentological data from New South Wales and Queensland, eastern Australia, indicate that the Late Paleozoic Ice Age comprised at least eight discrete glacial intervals (each 1–8 Ma in duration, here termed “glaciations”), separated by nonglacial intervals of comparable duration. These events spanned an interval from mid-Carboniferous (c. 327 Ma) to the early Late Permian (c...

Following accretion of southern Siberian microcontinents to the compositions reveal up to one order of magnitude variation of some trace elements and ratios between suites, and show a progressive Siberian craton in the Early Paleozoic, five cycles of K-rich silicic magmatism, progressively decaying in volume, occurred on batholithic change in trace element concentration with decreasing age. Pla...