It’s then a matter of genus identification if you can - some ammonites are spiny which means that you approach their preparation differently some have very deep centres some shallow others have lots of ribs, others none at all. That certainly helps narrow down how we’re going to approach preparing it. We know that this one is from Black Ven, and so it’s not going to be a heteromorph as it is Jurassic in age. OK, so it’s obviously an ammonite - this is a really important start! You know that it’s probably going to be round and spirally.Īmmonites come in all different shapes and sizes. It’s really important to have an idea of what you’re working with. Affectionately known by locals as a ‘Prom’ and the most common calcite ammonite along this section of the Jurassic Coast. Our starting point, a Promicroceras ammonite in a nodule from Black Ven, between Lyme Regis and Charmouth in Dorset. Please make sure you’ve got eye and respiratory protection before you get going. The nodules from Lyme Regis and Charmouth are relatively hard limestone, and so most people use an air pen or air scribe to uncover the calcite ammonites within. This tutorial is designed to show you how to approach preparing an ammonite with a beginner’s set up (an air pen or air scribe, with no air abasive) - the same principles apply for those of you using an electric engraver, but it will take a little longer. In this post we’ll go over the very basics of preparing an ammonite in a nodule. Preparing a Promicrocerasammonite from a limestone nodule- step-by-step fossil prep
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