Tonopah is a small town in the south-central portion of Nevada with a rich history of silver mining and a star sand dune complex known as Crescent (Tonopah) Sand Dunes just west of town. Because sand dunes accumulate sediments from broad geographic areas, sands from these environments are often used as a standard to describe […]
B22: Organic Carbon/Nitrogen Content in Age-Calibrated Soils At-Depth
Four Mile Creek is an important watershed in Southwestern Ohio, including floodplain deposits that have historically been used for agriculture. However, due to extensive anthropogenic use, it is difficult to determine pre-human geochemical norms. Organic carbon and nitrogen abundances are important for understanding the soil health overall, as well as providing important benchmarks for carbon […]
A33: What Can Symplectites Tell Us About Geological Processes on the Moon and Mars?
The work presented here reports findings from a detailed microscopic study of symplectites in lunar samples, specifically in basalts from the Apollo 15 mission and meteorites collected from Antarctica in 2018-2019. The symplectites studied are consistently composed of the same three minerals, olivine (olv), clinopyroxene (cpx), and silica (si). They represent the products of breakdown, […]
C04-T: How Fast does Magma Move? Insights from Volcanoes of the Central Andes
Reaction rims surrounding amphiboles in hornblendites allow for the investigation of the timescales associated with magmatic ascent beneath volcanoes and new insights into the magma dynamics beneath active volcanic centers. The hornblendites of this study originated from andesitic-dacitic lavas that erupted from the Quillicas Volcanoes of the Central Bolivian Andes approximately 1.4 million years ago. […]