Syndepositional fault control on lower Frasnian platform evolution, Lennard Shelf, Canning Basin, Australia
Annette D. George et al., School of Earth and Environment, University of Western Australia, Crawley, WA 6009, Australia. Pages 331-334.
Ancient reef complexes flourished in a large Late Devonian sea about 380 million years ago in northwestern Australia. This sea no longer exists but is now represented by marine deposits, including famous reef complexes that grew in shallow water along the margins of the sea. The northern part of this area, known as the Canning Basin, was tectonically active at that time (similar to the Red Sea today), and fault movements elevated some parts of the seafloor to provide ideal conditions for reef-building organisms. This has been well known for decades. Through their work on one of the major reef complexes, including being able to date more closely when deposition of carbonate sediments took place, George et al. are able to show that fault movements continued to strongly control sea-level changes in the region and, therefore, controlled the overall evolution of the reef complex. Understanding how ancient reefs evolved is very important economically because they are well-known petroleum reservoirs, as well as hosts for mineral deposits containing lead and zinc.
Hydrologic evolution of the Edwards Aquifer recharge zone (Balcones fault zone) as recorded in the DNA of eyeless Cicurina cave spiders, south-central Texas
Kemble White et al., Cave and Endangered Invertebrate Research Laboratory, SWCA Environmental Consultants, 4407 Montere
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Geological Society of America