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Mike Viney replied to the topic Mold, Cast and Steinkern in the forum What Is It? 3 years, 5 months ago
3 years, 5 months ago3 years, 5 months ago<span class=”atwho-inserted” contenteditable=”false” data-atwho-at-query=”@John-chri”>@john-christian</span>, @rleder, @bdattilo, @bmacfadden, @crobins, @rebecca-freeman, <span class=”atwho-inserted” contenteditable=”false” data-atwho-at-query=”@jkallmeyer“>@jkallmeyer</span>
Hi
My name is Mike Viney (@mike-viney) and I am new to myFOSSIL. I…[Read more]
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Jeanette Pirlo started the topic Help Make Augustynolophus morrisi California's State Dinosaur! in the forum Upcoming Opportunities 7 years ago
7 years ago7 years agoCalifornia is on the verge of having a state dinosaur, Augustynolophus morrisi, but it needs your help! The bill’s purpose is to increase curiosity in the sciences of students, the Southern California Paleontological Society is asking young members to submit posters in support of AB1540 . More information is provided in the myFOSSIL Ne…[Read more]
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Lisa Lundgren posted a new activity comment 7 years, 2 months ago
7 years, 2 months ago7 years, 2 months agoWe’ve got a fair number of folks interested in shells on the site–I’d say that @bostickkw has expertise on shells, so you might want to ask him, or maybe @don-megahan@michael-reagin or @scoller! And I’m sure @crobins would be interested in the horseshoe crab!
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Jack Kallmeyer replied to the topic Mold, Cast and Steinkern in the forum What Is It? 7 years, 3 months ago
7 years, 3 months ago7 years, 3 months ago@rleder, @bdattilo, @bmacfadden, @crobins, @rebecca-freeman, @dave-carlson
I stick by my previously submitted quote from Grabau. Your clam on the right in your image is an internal mold, i.e., it was made from the original shell by an infilling of mud. This is a steinkern. If you coated it with a silicone compound you will have a cast of the…[Read more]
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Eleanor Gardner started the topic Fossil Specialties + Contacts in the forum What Is It? 7 years, 6 months ago
7 years, 6 months ago7 years, 6 months agoNeed specific help? Try contacting the following folks based upon their specialty:
General Fossil Help
Eleanor Gardner @egardner
Ronny Leder @rleder
Sean Moran @smoran
Sharon Holte @sholte
Jon Cartier @jon-cartier
Daniel Killam @daniel-killam
Justin Tweet @justin-tweet
Walter Stein @walter-stein
Dava Butler @dbutler
Invertebrates:
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Dr. Ronny Maik Leder replied to the topic Mold, Cast and Steinkern in the forum What Is It? 8 years ago
8 years ago8 years ago@bdattilo, @bmacfadden, @crobins, @john-christian, @rebecca-freeman,
I agree with Jack’s comment, there is no need to make it more complicated. Grabau’s definition is very good and I guess since he was half German he should have known the meaning of Steinkern also very well 😉
Btw: with this section: “… Occasionally the space between the two…[Read more]
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John Christian replied to the topic Mold, Cast and Steinkern in the forum What Is It? 8 years ago
8 years ago8 years ago@rleder, @bdattilo, @bmacfadden, @crobins, @rebecca-freeman, @jkallmeyer
Thanks for everyone’s help.
Using suggestions provided by you and information from other sources, I am creating a set of definitions and rules to help everyone determine if a fossil is a mold or a cast. I am interested in making the definitions and rules better, clearer and…[Read more]
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John Christian started the topic Mold, Cast and Steinkern in the forum What Is It? 8 years ago
8 years ago8 years agoI consider steinkerns formed from sediment that entered a hollow natural object (such as a bivalve) to always be internal molds. Am I correct?
If a hollow natural object (bivalve) is not filled by sediment but is later filled by a precipitated mineral such as calcite then the calcite should be considered an internal cast when the original s…[Read more]
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John Christian started the topic Mold, Cast and Steinkern in the forum What Is It? 8 years ago
8 years ago8 years agoI consider steinkerns formed from sediment that entered a hollow natural object (such as a bivalve) to always be internal molds. Am I correct?
If a hollow natural object (bivalve) is not filled by sediment but is later filled by a precipitated mineral such as calcite then the calcite should be considered an internal cast when the original s…[Read more]