#stromatoporoid

[kiabugboy]

Late Ordovician, Laurentian warm water reef

From top left: archaeocrinus, diestoceras(Oncocerid), isorthoceras, armenoceras

Middle left: tcherskidium and proconchidium brachiopod

From bottom left: aulacerid 2 meter tall sponges, Deloprosopus, phacelloid corals

Top right: uncolored sketch of stromatoporoid and aulacerid sponge reef

[galswintha]

Skałka z Nyżą (The rock with the niche) is located in the central part of the Racławka Valley nature reserve by the tourist route near the Racławka stream. It is built of coarse-grained stromatoporoid limestone from the turn of Devonian and Carboniferous, making the outcrop the oldest rock in the area, dominated by the younger, Jurassic limestones. The name of the rock comes from the shallow recess located in it, made by the Racławka stream.  

[kiabugboy]

Researching the environment the Oncocerids lived in, some of the silurian reefs in Gotland, Sweden were primarily comprised of Stromatoporoid sponges.

These were sponges that grew in layers encrusting on rocks, sediments, each other. Creating a reef over time

The ones depicted here are new budding reefs, relatively empty, growing atop a sediment of crinoid fragments

Older reefs would have shared their space with tangles of camerate crinoids, which at the time were abundant and were found to be the most numerous at the reef flanks

(something I will get to modelling after this and I dread it)

[mineralsandsomerocks]

Stromatoporoid, Nordegg, Alberta

Flume Fm