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Found 5 results

  1. Pnwmedic

    Should I glue it?

    I whacked apart a concrete on today and found a beautiful bivalve but it split quite a bit. My friend superglues his crab concretions back together to etch them out. What is the best technique with this precious?
  2. DarkTr

    Small Ichthyosaurus

    Hi to everyone. I'm preparing a new fossil which comes from Germany in the Cretaceous, these are the information that i have. Now, I have seen that it's quite difficult both to recognize the bones and to eliminate the matrix but the work is going. Have you some advice for this type of fossil? And, i don't want to be wrong, but i see two different bones: a black one and a brown one. Are them two different animal or not? For the type of preparation I'm doing is a mechanic type.
  3. Kane

    A Hammering Primer

    Most of us here know how to use a hammer. Although it seems pretty basic, I thought I'd put together a short primer for those who are not as comfortable with, or are new to, hammering in the field. If you have any other tips to add, let me know and I can add them in here and give proper attribution for the sage advice. Hammering Techniques For those of us who break and split rock, hammers are by far among the most essential tools in the collecting kit. However, there are a number of best practices we can observe for hammer-use that can increase our power, precision, and reduce the chances of injury. This small primer is designed for those who may not be as comfortable with using a hammer in the field, and those who want to increase their existing skill. The hammer is the extension of your hand, which is an extension of all the muscles that lead up to it. Part 1: The Hammer Itself Just like any class of tool, using the right tool for the job is important. Just as one would not use a sledgehammer to drive a nail into a wall to hang a picture (unless they were a maniac like me), there are certain types of hammers that will not be ideal for the job - and in some cases, may cause injury. Having a range of hammers at your disposal is recommended. Having a good arsenal keeps you ready for whatever may come. Using the right kind of hammer requires an understanding of the material that will be subject to numerous blows. When dealing with hard, blocky matrix, a heavier hammer head with a sufficient shaft is required. When splitting fissile shale, mason or brick hammers with a chisel-sided end is more appropriate. Geologic hammers with a pick end are the gold standard as they can also be used to pry. Big, dense blocks need sturdy sledge hammers, while cracking nodules or small chunks can be done using a crack hammer. Unless there is no other option, hammers used for woodworking are not recommended. A nail claw hammer, for example, is simply not made for busting rock. So unless you are oddly trying to drive nails into rocks, leave the claw hammer for work around the house. For serious rock-busting, the shaft of the hammer should be either a solid steel-forged piece, or fibreglass joined securely to its head. Metal head + wood shaft hammers are not recommended for serious hammering as the head may fly off the shaft and cause injury. Fossil collectors of yesteryear did not have access to drop-forged hammers, but had they the choice they might have opted for not using a wood shaft. To supplement the hammer and its brute force, a range of chisels with different ends is effective in better channeling and distributing force, as are pry bars. These are extensions of the hammer blow that channel its force where you want it to go. In terms of your hammer, determine the following: What kind of hammer is required for the rock and/or task at hand? Is the hammer of a comfortable weight to be wielded for an extended period of time? Remember that the hammer has to be right-sized for you. Some may be comfortable with a 10, 5 lb or 3 lb sledge. If the hammer is too heavy or too light for your needs, your results in the field may suffer.
  4. Good afternoon. Are there any techniques that are useful in finding larger (3/4"+) teeth on MD/VA beaches? I've been teeth diving down in SC and NC, so I get the whole "if you want big teeth, look for big rocks, shells, etc." thing. Does that concept translate in some way to searching for shark teeth from local beaches? ex. Feel for 'x' type of material/muck/clay consistency? I've gotten fairly good at finding x < 3/4" teeth (ex. High tide line material, stuff at/near the "shelf"/drop off from the beach, etc.) . My last trip out...I found my first tooth in literally the first sifter load of material. I gave a few away to passersby and still ended up with 40+. I eventually got bored with it and just started experimenting with sifting through material from other areas of the beach, with varying degrees of success. Any thoughts/recommendations? I've got a spot that I'd like to hit again. Just curious on if there's a better/more efficient method of searching. Thank you.
  5. Mcmaker

    Preparation training!

    Hi, that's my second preparation using only handtools and table grinder for rough shaping. Limestone can be a pain but I'm slowly learning moves, can't wait for engraver I'm still loooking for my "style", let me know what's wrong and what is right
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