Fossil ID Requested, paleozoic reef

[Dick LaForge]

Here is a limestone reef rock from Tucki Mountain in Death Valley.  The strata is vertical.  There was a band of reef rock several hundred feet across.  Lots of crinoids but it's the sponge / archaeocyathan fossils that I'd like to know about.

This is the first time I've done this, so I'm not sure how the answers arrive...

 

Thanks very much!

Dick

 

[Tidgy's Dad]

Some sort of algae?

Doesn't look archaeocyathid to me.

Hello, and a very warm welcome to TFF from Morocco! 

[FossilDAWG]

Most of these photos show some species of receptaculitid.  You can google Receptaculites and Fisherites for images.  These are several genera, I don't know which one might be the best suggestion for your specimens.

 

Don

[piranha]

Looks similar to Ischadites mammilaris from this paper:

 

Foster, M. 1973

Ordovician receptaculitids from California and their significance.

Lethaia, 6(1):35-65

 

[Dick LaForge]

Thanks very much to those who wrote!  Makes sense to me, interesting fossil. 

Just for more context, I'm adding three more photos. 

...085 is a photo taken at the site showing more examples of this.

...761 is a limestone made almost entirely of crinoid parts, from the same site or very near to it.  Crinoids were an item in the Ordovician, would this and receptaculitids be found together?

...082 is from a different part of the ridge, so a different time.  My uneducated guess is stromatolite, but I'd like a better opinion.

 

Thanks in advance,