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North Dakota Pierre Shale Trip


Thomas.Dodson

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Looks like a Middle Devonian selection of mostly atrypids and productids to me.

I think I can give some tentative ids, but it's half five in the morning here and I'm just off to bed. 

See you in the morning. 

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Life's Good!

Tortoise Friend.

MOTM.png.61350469b02f439fd4d5d77c2c69da85.png.a47e14d65deb3f8b242019b3a81d8160-1.png.60b8b8c07f6fa194511f8b7cfb7cc190.png

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This fauna is very similar to what I have collected from the Devonian in Manitoba.  Even the color and lithology are a close match.  My collections are from the Dawson Bay Formation but there are other formations as well.  I will have to dig out my copy of Helen McCammon's Manitoba Geological Survey bulletin and get back to you.  It might take a while due to Christmas duties.

 

Don

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No.1 is my favourite but I don't know what it is.:shrug:Though I feel I should.

2. An orthid along the lines of Levenea? 

3. Cyrtospififer? Mediospirifer? Orthospirifer?

4. Can't rememeber.

5. Pseudoatrypa.

6. Tropidoleptus

7. Really nice but don't know. 

Sorry, not much help. 

I need to do some revision over the holidays. 

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Life's Good!

Tortoise Friend.

MOTM.png.61350469b02f439fd4d5d77c2c69da85.png.a47e14d65deb3f8b242019b3a81d8160-1.png.60b8b8c07f6fa194511f8b7cfb7cc190.png

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2 hours ago, Tidgy's Dad said:

No.1 is my favourite but I don't know what it is.:shrug:Though I feel I should.

2. An orthid along the lines of Levenea? 

3. Cyrtospififer? Mediospirifer? Orthospirifer?

4. Can't rememeber.

5. Pseudoatrypa.

6. Tropidoleptus

7. Really nice but don't know. 

Sorry, not much help. 

I need to do some revision over the holidays. 

More help than myself! I wouldn't have even known where to begin having rarely collected in paleozoic deposits until recently and not having information locality to go on.

 

Brach?#9 has several individuals among this stuff but they don't seem much detail so I didn't post it earlier. I guess I'll post it for completion purposes.

brachy.png.d02839d27e397814dd43fad9b70efd98.png

brachy2.png.0a88c2a97fc4bbcdb61d0839ac212f2c.png

 

These glacial erratics came from other sites.

Leperditia molds? I'm not sure what other ostracods get this big. These weren't found far from the other posted stuff.

5fe39af5a3292_Leperditia.png.19ba1f128ed0d269e8bcc05c897889cc.png

 

These all came from Mclean County North Dakota erratics. They've been sitting in my collection for many years.

#10

5fe39b8495390_newbrach1.png.3c3753ccc9c6620387d4391f1249c4c9.png

5fe39b882f971_Newbrach2.png.5298327ca329db46b5370ccd82cdc1c5.png

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And #14. As always, any information is appreciated. Do these appear similar to age as the ones already posted?

5fe39d2f312b4_newbrach12.png.2cca7c67c1255084ec246bf1d4490bb8.png

5fe39d31958f8_newbrach13.png.dc8a992d22fc6b89bb1eec8580d6c598.png

5fe39d328d705_newbrach14.png.3fdc5871b3af4e8056a2a9291d6e0f0f.png

5fe39d33a6a3d_newbrach15.png.800e5e286bc765ba83216cc1a328441c.png

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Don't know 9.

Yes to Leperditia sp. 

10. Athyris spiriferoides?

11. Stropheodonta demissa?

12. Pseodoatrypa devoniana

13. Atrypa reticularis

Yes, all appear to be Mid Devonian, though some of them also appear in other times, the group together suggest M.Dev. 

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Life's Good!

Tortoise Friend.

MOTM.png.61350469b02f439fd4d5d77c2c69da85.png.a47e14d65deb3f8b242019b3a81d8160-1.png.60b8b8c07f6fa194511f8b7cfb7cc190.png

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Very much appreciated. It's an interesting feeling having identities for glacial erratics!

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