Most common rock-forming minerals on Earth belong to a group of minerals called silicates. Silicates are distinguished from other minerals by the silica tetrahedron (sometimes called the silicate tetrahedron), a structural unit composed of one silicon atom surrounded by four oxygen atoms that bond directly to the silicon. This gives it the chemical formula ofContinue reading “How Do Silica Tetrahedra Work? – A #UREES101 #GoodQuestion”
Many rocks show layers. Sometimes the layers are twisted and bent.
Conroy, Emerson, Anemone, and Townsend, 2012, Let your fingers do the walking: A simple spectral signature model for “remote” fossil prospecting: Journal of Human Evolution, v. 63, p. 79-84. What’s it about? The authors demonstrate the utility of satellite imagery combined with surface observations and GIS software to make predictions about where fossil localities mayContinue reading “Long Distance Prospecting – #365papers – 2018 – 61”
Here it is. Day one. The day I leave the house and begin the three-day drive to my old stomping grounds near Laramie, Wyoming. Oh, but the getting there. But I’m ready. Meet Christine, our new (to us) Volvo, now outfitted for proper paleontological expeditioning.
Yonkee and Weil, 2015, Tectonic evolution of the Sevier and Laramide belts within the North American Cordillera orogenic system: Earth-Science Reviews: v. 150, p. 531-593 What’s it about? This paper is a wonderful, yet highly technical, summary of the tectonic events leading to the Rocky Mountains as we know them today.
Price, Ferguson, Webb, Feng, Higgins, Nguyen, Zhao, Joannes-Boyau, and Louys, 2017, Seasonal migration of marsupial megafauna in Pleistocene Sahul (Australia-New Guinea): Proceedings of the Royal Society B, v. 284: 20170785 What’s it about? Seasonal migrations are seen in many large mammals. In modern animals, however, such migrations are not observed in marsupials. The authors putContinue reading “Migrating Marsupials of the Pleistocene – #365papers – 2018 – 44”
Byrnes and Karlstrom, 2018, Anomalous K-Pg-aged seafloor attributed to impact-induced mid-ocean ridge magmatism: Science Advances, v. 4: eaao2994 What’s it about? The Chixulub Impact is the event linked to the extinction of the dinosaurs. The authors here show that at the same time as the impact, ocean floor spreading increased for just a little while.Continue reading “Did the Chixulub Impact Make the Oceans Erupt More? – #365papers – 2018 – 43”
Dettinger and Quade, 2015, Testing the analytical protocols and calibration of volcanic glass for the reconstruction of hydrogen isotopes in paleoprecipitation, in DeCelles, Ducea, Carrapa, and Kapp, eds., Geodynamics of a Cordilleran Orogenic System: The Central Andes of Argentina and Northern Chile: Geological Society of America Memoir 212, p. 261-276. What’s it about? Isotopes ofContinue reading “Using Glass to Estimate Altitude – #365papers – 2018 – 37”
Grimm and Marchi, 2018, Direct thermal effects of the Hadean bombardment did not limit early subsurface habitability: Earth and Planetary Science Letters, v. 485, p. 1-8. What’s it about? The first billion years or so of Earth’s existence was marked by repeated bombardment of the planet by various asteroids, and even planetessimals. It is thoughtContinue reading “Did Bolide Bombardment Kill Life on Earth More Than Once? – #365papers – 2018 – 36”
Gunnell, Zonneveld, and Bartels, 2016, Stratigraphy, mammalian paleontology, paleoecology, and age correlation of the Wasatch Formation, Fossil Butte National Monument, Wyoming: Journal of Paleontology, v. 90, p. 981-1011 What’s it about? This paper contains a discussion of the mammalian paleontology at Fossil Butte National Monument, Wyoming. The authors examined and identified at least 46 speciesContinue reading “Fossil Mammals and the Rocks that Contain them at Fossil Butte, Wyoming – #UREES270 – 2018”