Daan Beelen

Researching and teaching sedimentology and stratigraphy

[Daan Beelen @daanosaurus_rex]

@porestar You know it. Hows it going?

[Daan Beelen @daanosaurus_rex]

Honored to have received the Robert Mitchum Award from the European Association of Geoscientists & Engineers (EAGE) for my work: https://t.co/6JrkOPoZCF. This is already the 2nd award for this work! Thanks to my co-author Lesli Wood and to EAGE for this recognition!

[Daan Beelen @daanosaurus_rex]

The differences between our best images of Jupiter from 1610 and 2020.

[Daan Beelen @daanosaurus_rex]

@DriftersCSIC @IACT_divulga These have been proven to be shallow marine tide-dominated deposits. The contourite interpretation was based on undersampled data: https://t.co/h9mhE5gpDA.

[Daan Beelen @daanosaurus_rex]

Enhanced satellite photo shows the colorful geology of an exposed salt dome in Southern Iran.

[Daan Beelen @daanosaurus_rex]

Glaciers calving into the ocean on Bouvet Island

[Daan Beelen @daanosaurus_rex]

High water has flooded the distributary channels of the Nadim Delta, leaving only some levees and meander scrolls exposed.

[Daan Beelen @daanosaurus_rex]

Here's some weird or just very long Dutch translations for common geological terms:

Basin floor fan = Bekkenbodemwaaier
Oxbow lake = Kronkelwaard
Sea surface temperature = Zeeoppervlaktetemperatuur
Turbidity current = Troebelheidstroom
Shelf-edge trajectory = Bekkenrandtraject

[Daan Beelen @daanosaurus_rex]

https://t.co/atGunlcT9u

Honored to receive the Basin Research Early Career Award for 2023! Thank you, @TheMountainPig , @sedimentology @UU_PhysGeog !

[International Association of Sedimentologists IAS @sedimentology]

The Basin Research @BasinResearch Early Career Award 2023 went to Daan Beelen @daanosaurus_rex for the paper titled 'Predicting bottom current deposition and erosion on the ocean floor' that can be found free here: https://t.co/6fkPomedrp

Congratulations!

[International Association of Sedimentologists IAS @sedimentology]

The Basin Research @BasinResearch Early Career Award 2023 went to Daan Beelen @daanosaurus_rex for the paper titled 'Predicting bottom current deposition and erosion on the ocean floor' that can be found free here: https://t.co/6fkPomedrp

Congratulations!

[Daan Beelen @daanosaurus_rex]

Beautiful satellite image of the remote Vava'u Island Group in the Kingdom of Tonga, Pacific Ocean

[Daan Beelen @daanosaurus_rex]

Some very cool trains of cross-stratified heterolithic siliciclastics from the Carboniferous in the Ardennes, Belgium. These are probably shallow marine (tidal?) sandstones and siltstones.

[Daan Beelen @daanosaurus_rex]

Here's another attempt at highlighting river scale, superimposing the Netherlands with a portion of the Ob river's channel belt.

[Daan Beelen @daanosaurus_rex]

The sizes of the world's largest rivers can be hard to wrap your head around. The Amazon's main channel can easily cover the city of Amsterdam, while channel belts can exceed 70 km in width, easily exceeding the distance Utrecht-Amsterdam. All images below are on the same scale:

[Daan Beelen @daanosaurus_rex]

A large braided stream runs parallel to a meandering stream in the Amazon Rainforest. They combine into a single braided stream.

[Daan Beelen @daanosaurus_rex]

This is another rare example of deep ocean barchans. In this case, they are visible in seismic time slices off the coast of Uruguay. These Cretaceous dunes made out of foraminiferal sand, migrated parallel to the slope, probably driven by thermohaline currents.

[Daan Beelen @daanosaurus_rex]

These are barchan dunes at a depth of over 2700 m. They were imaged using high-resolution sonar back in the 70s (Lonsdale and Malfait, 1974). Such deep ocean barchan dunes are probably common but only 1-2% of the ocean floor has been mapped in sufficient resolution to see them.

[Daan Beelen @daanosaurus_rex]

The Utrecht University quiz system is fully automated and allows me to watch my students pass (and fail) in real time.

[Daan Beelen @daanosaurus_rex]

Check out my recent SedsOnline YouTube Lecture about why sand dunes form and how you can predict their speed based on their shape: https://t.co/Dm3Y4e0rFO

[Daan Beelen @daanosaurus_rex]

The Hunga Tonga/Hunga Haʻapai volcanic islands. grew from 2006 until they were merged into a single island in 2015 that was 5km across. The 2022 eruption visible in one of the images was the largest explosion ever recorded, during which the islands disappeared almost entirely.