unknown fossil

[drbush]

Hi friends ,can you help me with this .I went to Dhruma city 70 km to the west of Riyadh , the area is Jurassic .I found this small round fossils they look like sea urchin , in clusters of various sizes , hollow from the lower side .What could they be ?

[ynot]

Concretions. They may have formed over something biologic, but it is hard to be sure.

[Manticocerasman]

those look like fossil sponges. and realy nice ones

[drbush]

could it be Hindia sphaeroidalis ?

 

Hindia sphaeroidalis

[TqB]

14 minutes ago, drbush said:

could it be Hindia sphaeroidalis ?

 

Hindia sphaeroidalis

Not if they're Jurassic (that one's Devonian). I agree they're nice sponges but probably need local knowledge or a specialist to identify.

[Tidgy's Dad]

Very nice fossil sponges.