#Rugosa (rugose corals) are an extinct class of solitary or colonial corals that were abundant in Middle Ordovician to Late Permian seas.[1][2][3]

In honour of tomorrow's field trip, here is a solitary rugose (horn) coral in a block of Tyndall stone in downtown Calgary! This one is from the late Ordovician, about 450 million years ago.

Horn corals are named for their horn-like shape; this is a cross section. They are common fossils in downtown Calgary and the Rockies. They went extinct in the end-Permian mass extinction, about 252 million years ago.

#palaeontology #paleontology #fossilfriday #fossils #rugosa #coral #alberta

Come Raggiungere la Roccia Rugosa #howto #diy #Rugosa
#Rugosa #roses, also known as beach roses, which are hardy, easy-care shrubs. They are known for their wrinkled leaves and fragrant flowers, which are followed by colorful hips in the fall.
#fossils #fossil
Brown - #sandstone from Papartynฤ—, Lithuania, Jurassic period. #lithuania #jurassic
Whitish -??? I have no memory where I got that rock from. Maybe a present...
#paleo #paleontogy #geo #geology #shells #shell #rugosa

I was given a few #fossils brought back from the island of #Gotland. They are from the #Silurian period.

1 and 7 is #Rugosa
2 is #Trilobits
3 is #Brachiopods
4 is #Bryozoa
5 and 6 is #Cinoidea

#paleontology #geology