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Another one of my rock garden finds, what do you think this is?  It has shell fossils throughout it.  Maybe limestone, but I cracked a corner off and it was filled with cavities with crystals growing inside, some are rusty others are white.

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Just cut it open, and it's not hollow inside like I thought it was.  It was hard to cut through this and there were areas, I'm assuming the area with the red band, that stopped progress as soon as it hit it.  It almost seems like rust, but it's not at all magnetic.  It stunk a little when I was cutting it, a little fainter than sewage, it didn't upset my senses but I noticed it.  Run off from water was brown.

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Your probably right on your limestone assumption, though could be dolostone as well which is a bit harder. If you can get a good closeup photo of the crystals in the vugs that could help.  The red area is most likely iron staining.

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6 hours ago, fuss said:

Your probably right on your limestone assumption, though could be dolostone as well which is a bit harder. If you can get a good closeup photo of the crystals in the vugs that could help.  The red area is most likely iron staining.

I tried taking pictures of them, but I couldn't get anything to focus, the holes are to small for me to take a good pic.  However I do have another find, this was in on of my fields, is part of this agate?  It seems to be a cluster of shells, and alot of the shells are like quartz.  One piece on the back has a hole that stands out, it has a partial shell encrusting it.

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We have very similar Marine fossils here in MN south of the divide, but more often in sandstone or limestone.

When you say hole, do you mean the round circle? The "sticking up" circle my friend may be a ischadite (sponge) fossil.

Quartz will preserve the bivalve shells well & that's a lucky find since they're delicate. You may have brachiopod fossils as well, the two can look similar at first, to me anyway. I'm no expert, just an avid collector.  They're very nice!

You must have some fertile fields!

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5 hours ago, Sonja said:

We have very similar Marine fossils here in MN south of the divide, but more often in sandstone or limestone.

When you say hole, do you mean the round circle? The "sticking up" circle my friend may be a ischadite (sponge) fossil.

Quartz will preserve the bivalve shells well & that's a lucky find since they're delicate. You may have brachiopod fossils as well, the two can look similar at first, to me anyway. I'm no expert, just an avid collector.  They're very nice!

You must have some fertile fields!

The hole was more rectangular than circular, maybe it was in the process of closing up from a circle.  I'm going to soak it in white vinegar and clean it up and see what is revealed.  Yes these fields are very rich, with the combination of all the calcium and two great fires it is natural fertilizer all around

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