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  1. These are not cave systems…. these are bedrock types which are susceptible to having cave systems.

  2. Apptubrutae on

    Louisiana, Rhode Island, and maybe Delaware the only state after of caves.

    Louisiana being quite large for having nothing too. Obviously not too surprising since the bottom half is obviously not cave friendly, lol. But not even a little something in the top half

  3. Seeing some familiar to me pockets.

    Alabaster Cave OK

    The driftless area, IA, MN, WI.

    Loess hills in IA.

    Fantastic Caverns in MO

    Longhorn Caverns TX

    Carlsbad, NM, White sands, and mountains that feed white sands.

    The red smily face of lava heavy lowlands in Idaho is where Yellowstone caldera ate the Rockies. Craters of the Moon NM is in there too.

  4. whimsical-crack-rock on

    Now someone take this map, and then find a different map about like child disappearances or Alien abduction reports or something wild and overlay it over the top. Then post it with the caption “What they won’t teach you in school….” or “Coincidence?” and then just never reply to any comments.

  5. WilliamJamesMyers on

    spelunking club in high school. long story short, group of 3 of us were scouting ahead when the teacher had to sprint up to us and make us go back to the turn we missed. he said if we kept going that way we could have gone for days. southern indiana. endless really, we got out jumping down a hole into water and swimming like 20ft out onto a sand beach. that area to exit was covered in spiders because of the water exit…

  6. Salty-Snowflake on

    Of makes you feel better, the sink-hole red in Kentucky is pretty much spot on. 🤣

  7. Yer, uh, yer a sinkhole hotspot!

    In all seriousness, this is a fascinating map. We love our limestone bedrock here in Chicago. Wonder why the middle bits of Illinois aren’t covered.

  8. If you have never been to a big cave you should go at least once. It is cool. I took a tour of one in Kentucky years ago. We walked around underground for like 30 minutes, thinking we were going to come up a mile away from where we started & it was just across the parking lot. Being underground messes with your sense of direction.

    At one point during the tour they shut off all the lights for about 30 seconds & it was the blackest darkness I have ever experienced.

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