#hardgrounds
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berndandeweg.bsky.social
Even a town like #Amstelveen hosts some impressive #UrbanGeology: four times pretty different #limestone. #Goniatite, #ooids, #gastropod (#nerinea) and #hardgrounds with #bioturbation. #geology #rocks ⚒️🧪
April 19, 2025 at 4:50 PM
coastalpaleo.bsky.social
I have a tough time accepting that... during the Ordovician there was enough dissolved calcium (magnesian calcite) for corals and hardgrounds to form, and scores of other marine invertebrates with calcareous shells
March 26, 2025 at 3:52 AM
allatsea.bsky.social
🚨NEW STUDY 🚨
Linkages between megafauna and ferromanganese crusts outlined in SoCal seamounts.

Implications for #DeepSeaMining🪸⛏️
🦑https://www.sciencedirect.com/science/article/pii/S0967064525001092?via%3Dihub
Megafaunal community structure on ferromanganese and phosphorite hardgrounds in the Southern California Borderland
The Southern California Borderland (SCB) is a topographically complex region on the active continental margin that hosts varied hardground habitats, i…
www.sciencedirect.com
November 14, 2025 at 11:04 AM
rapiduplift.bsky.social
A lovely post by Mark Wilson of Wooster College on their collection of carbonate hardgrounds from the Ordovician , Jurassic, and Cretaceous.

woostergeologists.scotblogs.wooster.edu/2024/09/25/c...
September 27, 2024 at 11:24 AM
geolassoc.bsky.social
Correlation of the lower and middle Turonian chalks of south-west England and north-west France - condensation towards the Cornubian and Armorican massifs by Andy Gale

In Proceedings of the Geologists' Association, vol 137, issue 1, Feb 2026: www.sciencedirect.com/science/arti...
Selected structural features in southern England, the English Channel and northwest France. The distribution of the correlative Tilleul and Ogbourne Hardgrounds is shown; these are absent to the north-east of the Wight–Bray Fault and associated with Variscan basement thrusts across central southern England. The section at Winterbourne Kingston, on the Litton Cheyney Fault, shows a conglomerate of older Cretaceous debris derived from the overthrust hanging wall, deposited on a surface correlative with the Ogbourne Hardground (Gale, 2019a). The Ogbourne Hardground is absent in the marginal successions in Devon. 'Strahan's Hardground' at Lewes, East Sussex, is correlative with the Ogbourne Hardground. Map modified from Wikimedia Commons. Identification of marker marl beds in the lower and middle Turonian of the northern Anglo-Paris Basin. See text for detailed explanation. Geological map of the area adjacent to the English Channel, to show the Cornubian and Armorican Massifs and the Turonian depocentre. This study focuses on successions on the Devon and Seine-Maritime coasts, where the successions thin towards the basin margins. Map modified from Wikimedia Commons. Front cover of the scientific journal Proceedings of the Geologists' Association.
February 17, 2026 at 1:06 PM
obialik.bsky.social
It's in this one: www.sciencedirect.com/science/arti...

How late in the Proterozoic is the section? Because that sounds surprisingly similar to Phanerozoic hardgrounds. The iron redox gradients specifically are conducive to phosphate mineralization.
Tropical storm-induced disturbance of deep-water porewater profiles, Gulf of Aqaba
Storms have long been recognized as a force that agitates sediments, even in the deep-water. In shallow water depths (<40 m) sediments are affected do…
www.sciencedirect.com
August 4, 2025 at 3:07 PM
ordofibonacci.bsky.social
Recent marine carbonate hardgrounds at Abu Dhabi: towards a better understanding of ‘hidden hardgrounds’ in the geological past
Frontiers
www.frontiersin.org/journals/mar...
Frontiers | Recent marine carbonate hardgrounds at Abu Dhabi: towards a better understanding of ‘hidden hardgrounds’ in the geological past
Marine hardgrounds are common features during the Phanerozoic and hold significant sedimentological and economic importance. Intriguingly, previous reports o...
www.frontiersin.org
June 3, 2025 at 7:20 AM
jeromeollier.bsky.social
Recent marine carbonate hardgrounds at Abu Dhabi: towards a better understanding of 'hidden hardgrounds' in the geological past - Frontiers in Marine Science

www.frontiersin.org/journals/mar...
June 2, 2025 at 10:05 PM