[1] The Kyrgyz Range, located on the northern margin of the western Tian Shan, illustrates long-term (10–10 year) transient landscape evolution in response to an active basement-cored rock uplift. Eastward propagation of range uplift has progressively exposed resistant bedrock capped by a tilted, (formerly) planar, pre-Cenozoic unconformity. We develop an approximate, stream power–based analyti...

Mammalian fossils from two principal collecting areas in the lower Hanna Formation of the Carbon Basin comprise three faunas, the Grayson Ridge, Halfway Hill, and Sand Creek faunas. The Grayson Ridge and Halfway Hill faunas are diverse, consisting cumulatively of 29 mammalian species, at least two of which are new. The faunas are approximately equivalent in age and are either latest lbrrejonian...

Recent geological work in south-west Tasmania on a regional scale has allowed the compilation of existing information regarding Lower Palaeozoic unconformities, namely the description of new localities and in some cases the amplification and extension of previously described exposures. Carey and Banks (1954, p. 245) provide a review of information to 1954 and their classification of unconformit...

In this study, a conceptual model is developed based on common features of typical unconformity-related uranium deposits in the Athabasca Basin, Canada. Three reactive flow modeling scenarios are designed to address effect fault extension formation deposits. Our results indicate that location zone relevant unconformity crucial fluid circulation both sandstone layer and basement unit, temperatur...

Middle Neoproterozoic sedimentary strata are widely distributed on the periphery of Yangtze Block. In western Jiangnan Orogen, they divided into Lengjiaxi and Banxi groups by “Wuling unconformity,” Group is further Madiyi Formation Wuqiangxi “Xihuangshan unconformity.” However, timing tectonic significance Wuling Xihuangshan unconformities remain unclear, which hampers our understanding Precamb...