Jessica Marggraf
@jessicamarggraf.bsky.social
Postdoc at the University of Minnesota, St. Anthony Falls Laboratory | Interested in fluvial geomorphology, sediment dynamics and their measurement techniques, bedrock river erosion
Reposted by Jessica Marggraf
I am seeking a postdoctoral researcher for a USGS project. See below for details!
July 22, 2025 at 10:44 PM
I am seeking a postdoctoral researcher for a USGS project. See below for details!
Reposted by Jessica Marggraf
Reposted by Jessica Marggraf
Check out this time-lapse video of waves eroding an ice front from an experiment conducted in our cryogenic wave tank at the University of Wisconsin-Madison. The tank is housed in a walk-in freezer, and the waves are precisely controlled. This video captures about an hour of wave erosion.
July 16, 2025 at 2:17 PM
Check out this time-lapse video of waves eroding an ice front from an experiment conducted in our cryogenic wave tank at the University of Wisconsin-Madison. The tank is housed in a walk-in freezer, and the waves are precisely controlled. This video captures about an hour of wave erosion.
I'm excited to start the sample preparation for cosmogenic dating at the University of Cincinnati! We'll be following the procedure of @erraticscience.bsky.social to use 36Cl on whole rock basalt on our 1.1. Ga old samples from the Lake Superior basin. 🧪👩🔬
✔️ Etching the samples in nitric acid.
✔️ Etching the samples in nitric acid.
July 9, 2025 at 5:03 PM
I'm excited to start the sample preparation for cosmogenic dating at the University of Cincinnati! We'll be following the procedure of @erraticscience.bsky.social to use 36Cl on whole rock basalt on our 1.1. Ga old samples from the Lake Superior basin. 🧪👩🔬
✔️ Etching the samples in nitric acid.
✔️ Etching the samples in nitric acid.
Back from the field! We've been collecting samples for cosmogenic radionuclide dating using 36Cl on whole rock. We're interested in fluvial incision and waterfall retreat rates in the Western Lake Superior Basin. This is also a beautiful study site with Temperance, Gooseberry and Cascade Rivers!
June 20, 2025 at 10:46 PM
Back from the field! We've been collecting samples for cosmogenic radionuclide dating using 36Cl on whole rock. We're interested in fluvial incision and waterfall retreat rates in the Western Lake Superior Basin. This is also a beautiful study site with Temperance, Gooseberry and Cascade Rivers!
First day of sample preparation for cosmogenic dating. We're starting with crushing, milling and sieving the sample material.
June 14, 2025 at 12:58 AM
First day of sample preparation for cosmogenic dating. We're starting with crushing, milling and sieving the sample material.
Today was the first day of our annual NSF funded project on the Lake Superior Basin. I presented my work on the lithological controls on erosion processes in bedrock rivers and the fluvial geomorphology on the North Shore. 🏞️🌊🏔️🧊
June 13, 2025 at 1:15 AM
Today was the first day of our annual NSF funded project on the Lake Superior Basin. I presented my work on the lithological controls on erosion processes in bedrock rivers and the fluvial geomorphology on the North Shore. 🏞️🌊🏔️🧊
This week, I attended the @csdms.bsky.social annual meeting, where I presented my work on the control of lithological properties on bedrock river erosion, using field and flume measurements. I enjoyed this meeting with great keynote talks, lots of time for interaction and daily workshops! 🏞️💻
May 18, 2025 at 1:06 AM
This week, I attended the @csdms.bsky.social annual meeting, where I presented my work on the control of lithological properties on bedrock river erosion, using field and flume measurements. I enjoyed this meeting with great keynote talks, lots of time for interaction and daily workshops! 🏞️💻
Happy to see @stanthonyfallslab.bsky.social here! I'm looking forward to seeing more of our amazing research! 🏞️🌊
April 22, 2025 at 12:09 PM
Happy to see @stanthonyfallslab.bsky.social here! I'm looking forward to seeing more of our amazing research! 🏞️🌊
Reposted by Jessica Marggraf
⚠️ DEADLINE EXTENSION⚠️
Deadline extended to WEDNESDAY 12th FEBRUARY to present your research at the next SedsOnline student webinar on Wednesday 26th February!
No need to prepare a proper abstract, just answer 3 short questions about your methodology, research aims, results & interpretations!
Deadline extended to WEDNESDAY 12th FEBRUARY to present your research at the next SedsOnline student webinar on Wednesday 26th February!
No need to prepare a proper abstract, just answer 3 short questions about your methodology, research aims, results & interpretations!
January 30, 2025 at 3:24 PM
⚠️ DEADLINE EXTENSION⚠️
Deadline extended to WEDNESDAY 12th FEBRUARY to present your research at the next SedsOnline student webinar on Wednesday 26th February!
No need to prepare a proper abstract, just answer 3 short questions about your methodology, research aims, results & interpretations!
Deadline extended to WEDNESDAY 12th FEBRUARY to present your research at the next SedsOnline student webinar on Wednesday 26th February!
No need to prepare a proper abstract, just answer 3 short questions about your methodology, research aims, results & interpretations!
Reposted by Jessica Marggraf
☕️ New year, new Coffee Hour! Connect with AGU EPSP's featured early career researchers Shayla Triantafillou and Dr. Karin Lehnigk on Wednesday, January 29th at 14:00 NYC, 11:00 San Francisco.
Register through QR code or at: forms.gle/v5k8Qy8sG5Pp...
Register through QR code or at: forms.gle/v5k8Qy8sG5Pp...
January 24, 2025 at 10:18 PM
☕️ New year, new Coffee Hour! Connect with AGU EPSP's featured early career researchers Shayla Triantafillou and Dr. Karin Lehnigk on Wednesday, January 29th at 14:00 NYC, 11:00 San Francisco.
Register through QR code or at: forms.gle/v5k8Qy8sG5Pp...
Register through QR code or at: forms.gle/v5k8Qy8sG5Pp...
Reposted by Jessica Marggraf
December 13, 2024 at 7:28 PM
Getting ready for #AGU and doing the last revisions for my elightening presentation on Friday! Super excited to attend AGU for the first time!
December 7, 2024 at 6:28 PM
Getting ready for #AGU and doing the last revisions for my elightening presentation on Friday! Super excited to attend AGU for the first time!
Reposted by Jessica Marggraf
Did you feel it? Report your experience here earthquake.usgs.gov/earthquakes/...
December 5, 2024 at 8:58 PM
Did you feel it? Report your experience here earthquake.usgs.gov/earthquakes/...
Check out our new paper on suspended sand concentration computation and uncertainty estimation in the cross-section! esurf.copernicus.org/articles/12/...
River suspended-sand flux computation with uncertainty estimation using water samples and high-resolution ADCP measurements
Abstract. Measuring suspended-sand fluxes in rivers remains a scientific challenge due to their high spatial and temporal variability. To capture the vertical and lateral gradients of concentration in...
esurf.copernicus.org
November 23, 2024 at 6:27 PM
Check out our new paper on suspended sand concentration computation and uncertainty estimation in the cross-section! esurf.copernicus.org/articles/12/...