Geology Commons^™

Estimated Amounts Of Terrestrial Carbon Mobilized And Sequestered By The 1980 Mount St. Helens Eruption, Washington State, Usa, Lizzet G. Reyes

Dissertations and Theses

Volcanic eruptions significantly influence the geologic carbon cycle by emitting CO₂ and mobilizing terrestrial carbon pools. The 1980 Mount St. Helens (MSH) eruption offers a unique case study, triggering a massive landslide that displaced 2.7 km³ of sediment, buried 600 km² of forest, and disrupted regional carbon dynamics. Pre-eruption terrestrial carbon stocks, including aboveground biomass (AGB), dead biomass (D), and soil organic carbon (S), averaged 209.5 tC/ha. Post-eruption, total carbon density fell to 118.7 tC/ha, driven mainly by a 51% reduction in AGB, modest declines in D, and redistribution of S. Over 36 years, ecosystem recovery increased …

The Geologic History Of The Chehalis Forearc Basin, Washington State, Usa, Rud Lamb Moe

Dissertations and Theses

The Chehalis Basin, in southwest Washington, is one of a series of forearc basins between the Cascade Arc and the Coast Range in the Pacific Northwest. While the Seattle basin to the north, and the Portland-Tualatin basins to the south are both relatively well studied, the geologic evolution of basins in between is poorly constrained. The Chehalis basin is underlain by accreted Eocene oceanic basalt of the Crescent Formation. The basin fill consists of sedimentary rocks and volcanic rocks deposited throughout the Cenozoic. It has undergone N-S shortening driven by transpressional stress from oblique subduction of the Juan de Fuca …

Experimental Impacts Into Sloped Targets, J.L.B. Anderson, Tyler S.L. Kadrie, A.L. Miller, C.J. Cline Ii

Research & Creative Achievement Day

Asymmetric craters have been ob-served on sloped surfaces on the Moon [1] and extensively across Vesta [2] and Ceres [3]. For example, Lowell Crater (Fig. 1A) is a large crater on the surface of the Moon that has a small-er crater, Lowell H, which formed when an asteroid impacted the sloped surface of Lowell’s crater rim [1]. The topography map of Lowell H (Fig. 1B) shows the original sloped crater wall, the highly asymmetric and slumped Lowell H crater, and the debris flows that formed during its collapse.

Typically, impact cratering experiments are performed into smooth, flat-lying targets as a …

Mgrre_Geolog_Collections Weber, Harry B 1 21011286290000, Mgrre Western Michigan University

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Mgrre_Geolog_Collections Crowley, Orville 1 21037290830000, Mgrre Western Michigan University

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Mgrre_Geolog_Collections Lopez, Byrdie Et Al 1 21015284730000, Mgrre Western Michigan University

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Mgrre_Geolog_Collections Brown, Chloey 1 21049283400000, Mgrre Western Michigan University

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Mgrre_Geolog_Collections Buell, Darius & Charlotte, & Wallrich, W&R 1 21009292220000, Mgrre Western Michigan University

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Mgrre_Geolog_Collections Brokoff, Edmund & Coral 2 21051286160000, Mgrre Western Michigan University

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Mgrre_Geolog_Collections Squires 1-11 21045296250000, Mgrre Western Michigan University

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Mgrre_Geolog_Collections Schultz, Emil 1 21051285590000, Mgrre Western Michigan University

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Mgrre_Geolog_Collections Smith, George C 1 21007285830000, Mgrre Western Michigan University

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Mgrre_Geolog_Collections White, Irvine & Francis L 1 21051288350000, Mgrre Western Michigan University

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Mgrre_Geolog_Collections Shea, Mortimer J Et Al 1-25 21035305630000, Mgrre Western Michigan University

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Mgrre_Geolog_Collections Pavlis, Elmer & Dorothy 1-3 21055333270000, Mgrre Western Michigan University

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Mgrre_Geolog_Collections Brokoff, Edmund & Coral 1 21051285580000, Mgrre Western Michigan University

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Mgrre_Geolog_Collections Valleau Et Al 1-14 21055368810000, Mgrre Western Michigan University

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Mgrre_Geolog_Collections State Paradise 2-19 21055307630000, Mgrre Western Michigan University

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Mgrre_Geolog_Collections Ramsay, Ferris Et Al 1-29 21055303130000, Mgrre Western Michigan University

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Mgrre_Geolog_Collections State Union & Rokos Unit 1-18 21055314760000, Mgrre Western Michigan University

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