crh26 Posted April 10, 2015 Share Posted April 10, 2015 Hello everyone, I am attempting to identify and generally date two fossils, one which I believe is a medium sized ammonite based on the fern-like outer shell patterning, and the other a large grouping of orthoceras. The 'ammonite' measures 12" x 10" x 6", and the grouping of 'orthoceras' measures 15" x 5" x 3-1/2". Any help would be greatly appreciated. Thanks in advance, Christy H. Link to comment Share on other sites More sharing options...
Manticocerasman Posted April 10, 2015 Share Posted April 10, 2015 Hello crh26 Welcome to the forum. The fern like suture lines do indeed suggest an ammonite, but do you have any idea where de fossils where found? It would help a lot for the determination. Kevin 1 growing old is mandatory but growing up is optional. Link to comment Share on other sites More sharing options...
crh26 Posted April 10, 2015 Author Share Posted April 10, 2015 Hello Kevin, Thank you so much for the welcome and quick reply. I unfortunately do not know where they were found. They were purchased in Alaska about 20 years ago. Thanks again, Christy Link to comment Share on other sites More sharing options...
Fossildude19 Posted April 10, 2015 Share Posted April 10, 2015 Hi, and Welcome to the Forum. I believe the Orthoceras fossils are from Morocco, and are generally considered to be Devonian in age, although various sources I saw list Silurian and sometimes Ordovician as the time periods. I have no idea on the ammonite, unfortunately. Regards, 1 Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
Ludwigia Posted April 10, 2015 Share Posted April 10, 2015 (edited) I agree with Tim on the orthoceras plate. Without knowing the site and stratigraphical position, it's going to be very hard to determine the ammonite, though. Very many ammos through the various epochs have that form and since it's just an internal mold with no shell remaining, you can't get closer to a determination through its outer structure. A real authority would have to have it in his hands and study it closer. But nevertheless, maybe someone here recognizes it for what it is. It could very well be that the ammo comes from the northwest. Edited April 10, 2015 by Ludwigia 1 Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
crh26 Posted April 10, 2015 Author Share Posted April 10, 2015 Thank you Tim and 'Ludwigia' for your helpful comments! Much appreciated. Link to comment Share on other sites More sharing options...
abyssunder Posted April 10, 2015 Share Posted April 10, 2015 Hello,Christy,and welcome to the Forum! I have an Orthoceras from Morocco and looks very similar to what you have,shape,color,structure and polishing.So I think yours cames from the same place as mine. 1 " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
crh26 Posted April 10, 2015 Author Share Posted April 10, 2015 Thank you so much 'abyssunder', I appreciate the information! Link to comment Share on other sites More sharing options...
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