Publications by authors named "C S Siddoway"
Hematite U-Pb dating of Snowball Earth meltwater events.
Proc Natl Acad Sci U S A
November 2024
The Snowball Earth hypothesis predicts global ice cover; however, previous descriptions of Cryogenian (720-635 Ma) glacial deposits are limited to continental margins and shallow marine basins. The Tavakaiv (Tava) sandstone injectites and ridges in Colorado, USA, preserve a rare terrestrial record of Cryogenian low-latitude glaciation. Injectites, ridges, and chemically weathered crystalline rock display features characteristic of fluidization and pervasive deformation in a subglacial environment due to glacial loading, fluid overpressure, and repeated sand injection during meltwater events.
View Article and Find Full Text PDFThe Great Unconformity marks a major gap in the continental geological record, separating Precambrian basement from Phanerozoic sedimentary rocks. However, the timing, magnitude, spatial heterogeneity, and causes of the erosional event(s) and/or depositional hiatus that lead to its development are unknown. We present field relationships from the 1.
View Article and Find Full Text PDFThe original version of this Article contained an error in the spelling of the author Florence Colleoni, which was incorrectly given as Florence Colloni. This has been corrected in both the PDF and HTML versions of the Article.
View Article and Find Full Text PDFArticle Synopsis
- Understanding the Antarctic ice sheet's response to global warming is based on its historical behavior, but there are limitations in current topographic data and knowledge of subsurface processes.
- Numerical models, which are essential for predicting future changes, are challenged by the complexity of these interacting oceanic, glaciological, and hydrological processes.
- To improve modeling accuracy, future research must incorporate observations from various disciplines and address the complexities across multiple spatial and temporal scales.