Geology

Bedforms and Cross-Bedding in Animation

I spent two years working as a Geologist at the USGS in Santa Cruz, CA.  Bedforms and Cross-Bedding in Animation by David M. Rubin and myself is a college-level textbook on sediment transport processes.  It’s available for purchase here or you can play with the online, interactive exploration tool via the USGS Bedform Sedimentology Site. Bedforms and Cross-Bedding in Animation

Bedrock Channel Evolution: Field Constraints and Physical Modeling

For my MS thesis in Earth Science I studied the evolution of bedrock channels and the fluid mechanics of bedrock erosion by abrasion in the slot canyons of the southwest United States. Abrasion-dominated fluvial erosion generates slot canyons with intricately undulating wall morphology. Flows in slot canyons are unusual in that the walls comprise a Bedrock Channel Evolution: Field Constraints and Physical Modeling

Subglacial environment inferred from bedrock-coating siltskins

The landscape revealed by retreating glaciers provides evidence, much of it ephemeral, for subglacial processes that are difficult to observe directly. Glaciers that thin over rough bedrock surfaces continue to slide by regelation as adjacent subsurface cavity systems develop and enlarge. Subglacial deposits, including the cemented coatings we describe here, provide insight into subglacial conditions.