Clastics Lab

Exploring Death Valley w/ @zzsylvester.bsky.social for fall field trip this week

New #OA @geosociety.bsky.social Geosphere pub 'landslide influenced delta stratigraphy' w/ @zzsylvester.bsky.social, Dunlap & Covault: pubs.geoscienceworld.org/gsa/geospher.... Paper's Figure 11 compares deltas w/ landslides v 'typical' delta ('typical' see: zsylvester.github.io/papers/fuji_...).

@utaustin.bsky.social @txgeosciences.bsky.social QCL Clastics Lab workshops & meeting this week

How ‘the big one’ near Seattle could trigger an earthquake in San Francisco Are two of the deadliest earthquake zones in North America linked? It's possible—but controversial.

A new study argues that in the past, Cascadia quakes have triggered the San Andreas to go off, and that it could happen again.

But other experts, while recognizing that may technically be possible, want more evidence.

Read more at NatGeo:

www.nationalgeographic.com/science/arti...

Next week at the #GSA2025, I'll be presenting my newly developed Python tool, 𝒑𝒚𝑪𝒐𝒓𝒆𝑹𝒆𝒍𝒂𝒕𝒐𝒓. We apply it to quantitatively re-examine the correlatability of Cascadia deep-water turbidites, previously interpreted as synchronous deposits of paleo-earthquakes.

Abstract: lnkd.in/gJ_KHH2j

It was a great experience to join and lead a team at the 2nd Geoscience Hackathon, and our team SeaPsychos won the first place🥇! Our students are amazing, very proud of them 🥳! Hook ‘em 🤘

Navajo Sst during @txgeosciences.bsky.social QCL Clastics Lab field trip last week.

Title and abstract of the Science paper by David Rubin and Ralph Hunter - Title: Bedroom Alignment in Directionally Varying Flows; Abstract: Many kinds of sediment bedforms are presumed to trend either normal or parallel to the direction of sediment transport. For this reason, the trend of bedforms observed by remote sensing or by field observations is commonly used as an indicator of the direction of sediment transport. Such presumptions regarding bedform trend were tested experimentally in bidirectional flows by rotating a sand-covered board in steady winds. Transverse, oblique, and longitudinal bedforms were created by changing only two parameters: the angle between the two winds and the proportions of sand transported in the two directions. Regardless of whether the experimental bedforms were transverse, oblique, or longitudinal (as defined by the bedform trend relative to the resultant transport direction), they all had trends that yielded the maximum gross transport across the bedforms. The fact that many of the experimental bedforms were neither transverse nor parallel to the resultant transport direction suggests that transport directions cannot be accurately determined by presuming such alignment.

A thread about how two geologists went to a beach with a plywood board and a protractor to see how variable wind directions influence bedform orientation - and published a paper in Science that blew my mind. 🧪⚒️🧵 1/23

@txgeosciences.bsky.social QCL Clastics Lab at Tusher Canyon, north of Green River, UT. Origin & architecture of channels incising parasequences.

@txgeosciences.bsky.social QCL Clastics Lab field trip to Cedar Mtn Fm last week (see Cole Speed PhD: pubs.geoscienceworld.org/gsa/geology/...).

Larry Syu-Heng Lai and I will be leading a short course at GSA 2025, "Modeling of Landscape Evolution and Basin Stratigraphy with goSPL". Registration closes on August 5th, so please register soon at this link lnkd.in/gsT6pSUK. We thank @clasticslab.bsky.social for their generous sponsorship.

Former @ClasticsLab PhD Paul Morris w/ #OA publication @segpublications @AAPGPubs #Interpretation on modeling & simulation of deep-water channel reservoirs: library.seg.org/doi/full/10....

More field trip planning- Navajo Sandstone near Capitol Reef NP

Utah field trip planning: Cedar Mountain channel belts south of Green River; Navajo & Ferron ssts in San Rafael Swell

Field trip planning w/ @zzsylvester.bsky.social- photos from Gentile Wash & Tusher Canyon, UT

Pleased to share that our paper “Retroarc foreland basins document past oceanic subduction history” is out in EPSL. 50 days’ free access through this link authors.elsevier.com/a/1l5vB,Ig4c....

Turbidite (mostly) canyon fill & some slides(?) at the crown jewel of @californiaparks.bsky.social- Point Lobos

In northern CA helping @txgeosciences.bsky.social PhD student Cassandra Guzman- Pigeon Pt Fm turbidites in the am, La Jolla fan @mbarinews.bsky.social sediment in the pm

@txgeosciences.bsky.social QCL PhD students Juan Gutierrez & Jenna Kohn receive West Texas Geo Society scholarships! Congrats!

Piece reporting some of our collaborative research w/ USGS in @txgeosciences.bsky.social seasonal 'Geoscientist' publication: www.jsg.utexas.edu/news/2025/04...

Dallas Dunlap successfully defended PhD today

@txgeosciences.bsky.social PhD Jenna Kohn working on some Cherry Canyon Formation cores from the Delaware Basin this morning

@txgeosciences.bsky.social QCL student Jenna Kohn awarded GEM Fellowship (www.gemfellowship.org/gem-fellowsh...)

https://doi.org/10.1130/B37343.1

Gulf Basin Depositional Synthesis (GBDS) on LinkedIn: Our students Juan Gutiérrez, Jazmin Villeda and Jake Margoshes presented… Our students Juan Gutiérrez, Jazmin Villeda and Jake Margoshes presented their work at the 14th Annual Jackson School Research Symposium.

www.linkedin.com/posts/gulf-o...

QCL students Cassandra Guzman & Jenna Kohn recognized for posters @txgeosciences.bsky.social Research Symposium last week. Congrats!

www.jsg.utexas.edu/news/2024/12...

The wind-blown sands of the Navajo Sandstone look great at all scales

🤩

GitHub - zsylvester/meandergraph: a graph-based approach to describing meanders and point bars a graph-based approach to describing meanders and point bars - zsylvester/meandergraph

These models were created using the 'meandergraph' Python module github.com/zsylvester/m...