Wisconsin Impact Craters
<< Crater
Crater >>
<< Crater
Crater >>
Jannette Kristine Kodesh Barron County Specimen. Dark matrix with impact particle forms. The green is hard to say, perhaps some nano copper or olivine. The red brown tone in iron with silica of course the dark matrix is black iron oxide Fe3O4. The red dot is iron or manganese. Is this specimen valuable? Yes, because it is bits and pieces of an impact and probably would make a nice cut and polish but really is not one rock you are looking for it is just the getting out and discovering.
Impact mosaic with impalement. Wisconsin.
Jason Robey · ·
Found in Clark county Wisconsin
Oblate impactite spheroid Fe3O4SiO2. It matters not if it is magnetic as shock which formed it will alter magnetism. The surface is plasma impalements. Not a fossil as you can notice the plasma impalements push against each other forming impact geometrics like squares. The elongation is from its velocity when it was formed as a bubble therefore elongated. While not the most common impactite these spheres are one of the most common to attract interest. Nov. 25, 2023.
Patrick Schmitt · ·
Found in a creek in Central Wisconsin USA. It's different than what is the majority of rocks. Not lava as it's dense and heavy. Looks like a big egg with dimples. Probably just a rock but it caught my eye
Impact craters the source of earth's minerals, like banded iron. Nov. 25, 2023.
Topographically visible craters have not been erased by subsequent geological events like more craters. Nov. 25, 2023.
Impact made sheet wave phenomenon. You can see this on water with a tuning fork make this shallow surface ripple effect. This is also how it was imprinted. Jan. 8, 2024.
Susan Staben Richards
This rock inspired me to become a geologist back in 1974. I took geology 101 at the U of Illinois and they took us on a field trip to Baraboo, Wisconsin (USA). This beautiful pink quartzite preserves some original sedimentary features. I did not get back there until I was a retired geologist and my daughter had moved to Wisconsin. These photos were taken at Devil’s Lake, Baraboo, Wisconsin, USA.
Impact sphere receiver. The St. Croix Valley Impact Crater is shown above with star. May, 12, 2024.
​
Lorenzo Fuentes · ·
Old cemeteries never disappoint.
INTERNET SAYS “This is the very interesting grave marker of Thomas Toberman in the historic Prairie du Chien cemetery. (Please respect all cemetery rules posted at the entrance.) There is a lot of speculation about this unusual-looking stone and its origins. Whether the marker is a meteorite, a rare stone formation, or something else…I’ll leave you to decide for yourself after you see it. I hope you enjoy.
Before dying, Mr. Toberman requested that this unusual rock be used as his headstone in the cemetery. Permission was requested from the Evergreen cemetery board to place the stone. After permission was denied because it wasn’t a “real” engraved marker, it mysteriously showed up on his plot the following week.
Meteorite? According to an article published in a local newspaper (the Courier Press) a few decades ago, the marker is a meteorite that fell as a fireball on the deceased’s farm when he lived in the Prairie du Chien area. From the looks of it, it is easy to imagine that it came from outerspace and became deeply pitted as it burned through earth’s atmosphere.
Meteor-wrong? Another theory is that it is a rare stone formation that can only be found in 2 or 3 places in the world (the St. Croix valley in Wisconsin, someplace in China, and possibly someplace in Arizona). This theory is that it is made of limestone that was eroded into its current shape by swirling vortices of water. According to this story, Mr. Toberman discovered the rock in the St. Croix River valley while working there as a lumberjack.”.... https://www.facebook.com/groups/1576487499800058/?mibextid=NSMWBT
A better map of Wisconsin Craters. These state maps fail somewhat for craters extending beyond state borders. May 12, 2024.
Oolite transition and shock melt. I like oolites. When doing field work I came across a specimen around Sparta, TN in an old quarry. I noticed it was a transition form. Here you can see the production of the impact spheres and the shock melt. Shock melt is a resonate energy like your microwave and cooks from the inside out, gathering around the center of mass. The iron is from the impacting meteor/bolide. Sept. 22, 2024.
Sam Lubbe
·
Silicified oolites, grant county. Looks a bit like fish eggs, I think.
Grant County.
Impact expansion nodule tektite/agate, rare. I am fond of the tektite charts that show the formation principles, see attached. This was a melt drop from the kinetic explosion when a large meteor/bolide hits Earth. https://www.researchgate.net/figure/Flatted-3D-model-of-bubble-complex-tektites-left-and-right-compared-to-a-snake-skin_fig1_353759105 Sept. 27, 2024.
Tim Brown specimen, Lake Superior.
Impact nodule high shock melt is a proto cinder. Oct. 15, 2024.
Tanya Overlien · ·
Hello everyone! I’m new to rock hounding and could really use some help with identifying specimens. I found this in the Kickapoo River (Driftless area) in Wisconsin. First 5 are wet pics, last 2 dry with different lighting. TIA!
The Kickapoo runs out of a two crater conjunction. Oct. 15, 2024.
Impact basalt. Why do I say that? I just saw the Wetumpka Impact Crater in Alabama and saw similar underlayment. Also keep in mind the drusy sparkles are tiny sand grains which would be distributed as an impact into a sand surface and not as an igneous or volcanic process. Attached is a picture I took. Oct. 16, 2024.
Kade Black
Hello. These came from Marathon Co. I think it’s black granite? And it really looks like there’s gold in it, but maybe just wishful thinking. What do you guys think? I’d love your feedback. The pics and videos aren’t very good but I tried to capture the sparkly nature of the black and the gold.
The radon enclosures of Wisconsin. Radon is the breakdown of uranium. So where did the uranium come from? I think the answer lies in the distribution patterns. They are making crater type outward impact tectonic patterns. While the attached maps differ, they also present similar macro results. Oct. 16, 2024.
