A=fern, B= Calamites C= Annularia; they are form/morphological taxons meaning that each major anatomical feature is its own fossils. For example, Annularia is this specific leaf pattern, while Astreophyllites is another and the overall genus is Calamites
Re: Fossils B/C
Posted: April 19th, 2015, 6:15 am
by UTF-8 U+6211 U+662F
varunscs11 wrote:
A=fern, B= Calamites C= Annularia; they are form/morphological taxons meaning that each major anatomical feature is its own fossils. For example, Annularia is this specific leaf pattern, while Astreophyllites is another and the overall genus is Calamites
Correct, your turn!
Re: Fossils B/C
Posted: April 19th, 2015, 2:03 pm
by varunscs11
Is it possible to tell the difference between a Crinoid columnal and a Blastoid columnal?
Re: Fossils B/C
Posted: April 19th, 2015, 5:56 pm
by UTF-8 U+6211 U+662F
varunscs11 wrote:Is it possible to tell the difference between a Crinoid columnal and a Blastoid columnal?
No, but crinoid stems are generally bigger.
Re: Fossils B/C
Posted: April 19th, 2015, 7:03 pm
by varunscs11
Correct. It is impossible to tell for sure whether it is a blastoid or crinoid unless the theca/calyx is fossilized along with the columnal
Re: Fossils B/C
Posted: April 20th, 2015, 2:31 pm
by UTF-8 U+6211 U+662F
Random Number generator told me to ask this question: