Date: 1/03/2018 14:46:23
From: PermeateFree
ID: 1194314
Subject: Revealing delicate fossils by grinding them away

I have not heard of this method before, but it seems to be a very novel way of collecting detailed fossil and probably other complex information from a difficult matrix.

>>Cloudina was a thin-shelled sea creature that existed about 545 million years ago, but due to the fact that Cloudina fossils are so delicate, they can’t simply be chipped out of the limestone matrix in which they’re embedded. Additionally, because they’re of the same density as that limestone, they won’t show up in X-rays of the rock. That’s where the Princeton Grinding Imaging and Reconstruction Instrument comes in.

It uses a diamond wheel to grind away very thin layers of the rock (fossils included), taking super-high-resolution photos of the exposed rock face after each layer is removed. When those photos are all run together, users are taken on a virtual 3D trip through the rock, seeing all the fossils in their original orientation to one another.<<

https://newatlas.com/giri-fossil-grinding/53613/?utm_source=Gizmag+Subscribers&utm_campaign=59ba56aff0-UA-2235360-4&utm_medium=email&utm_term=0_65b67362bd-59ba56aff0-92533145

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Date: 1/03/2018 14:55:32
From: Michael V
ID: 1194315
Subject: re: Revealing delicate fossils by grinding them away

Nice.

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Date: 1/03/2018 15:27:00
From: mollwollfumble
ID: 1194323
Subject: re: Revealing delicate fossils by grinding them away

PermeateFree said:


I have not heard of this method before, but it seems to be a very novel way of collecting detailed fossil and probably other complex information from a difficult matrix.

>>Cloudina was a thin-shelled sea creature that existed about 545 million years ago, but due to the fact that Cloudina fossils are so delicate, they can’t simply be chipped out of the limestone matrix in which they’re embedded. Additionally, because they’re of the same density as that limestone, they won’t show up in X-rays of the rock. That’s where the Princeton Grinding Imaging and Reconstruction Instrument comes in.

It uses a diamond wheel to grind away very thin layers of the rock (fossils included), taking super-high-resolution photos of the exposed rock face after each layer is removed. When those photos are all run together, users are taken on a virtual 3D trip through the rock, seeing all the fossils in their original orientation to one another.<<

https://newatlas.com/giri-fossil-grinding/53613/?utm_source=Gizmag+Subscribers&utm_campaign=59ba56aff0-UA-2235360-4&utm_medium=email&utm_term=0_65b67362bd-59ba56aff0-92533145

Interesting. It’s essentially the same method as that used in the visible human project

I’m glad that this method wasn’t used at Riversleigh, acetic acid worked.

There is some fossil coral reef limestone that I’d love to try this on. Because coal reefs are full of many different organisms closely packed together, 3-D computer graphics is by far the easiest visualisation technique.

Could it work with coal?

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Date: 1/03/2018 15:40:45
From: mollwollfumble
ID: 1194326
Subject: re: Revealing delicate fossils by grinding them away

mollwollfumble said:


PermeateFree said:

I have not heard of this method before, but it seems to be a very novel way of collecting detailed fossil and probably other complex information from a difficult matrix.

>>Cloudina was a thin-shelled sea creature that existed about 545 million years ago, but due to the fact that Cloudina fossils are so delicate, they can’t simply be chipped out of the limestone matrix in which they’re embedded. Additionally, because they’re of the same density as that limestone, they won’t show up in X-rays of the rock. That’s where the Princeton Grinding Imaging and Reconstruction Instrument comes in.

It uses a diamond wheel to grind away very thin layers of the rock (fossils included), taking super-high-resolution photos of the exposed rock face after each layer is removed. When those photos are all run together, users are taken on a virtual 3D trip through the rock, seeing all the fossils in their original orientation to one another.<<

https://newatlas.com/giri-fossil-grinding/53613/?utm_source=Gizmag+Subscribers&utm_campaign=59ba56aff0-UA-2235360-4&utm_medium=email&utm_term=0_65b67362bd-59ba56aff0-92533145

Interesting. It’s essentially the same method as that used in the visible human project

I’m glad that this method wasn’t used at Riversleigh, acetic acid worked.

There is some fossil coral reef limestone that I’d love to try this on. Because coal reefs are full of many different organisms closely packed together, 3-D computer graphics is by far the easiest visualisation technique.

Could it work with coal?

Oops, I meant coral reefs, but really did mean “with coal”.

Some older images of cloudina here. Lived in the late Ediacaran period and became extinct at the base of the Cambrian. That makes them very interesting.

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Date: 5/03/2018 17:33:28
From: Arts
ID: 1195651
Subject: re: Revealing delicate fossils by grinding them away

“Interesting. It’s essentially the same method as that used in the visible human project”

except that the visible human project didn’t destroy the specimen…

it’s a shame that this method does.. though better than not being able to study it in detail at all I suppose

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Date: 5/03/2018 17:36:53
From: PermeateFree
ID: 1195653
Subject: re: Revealing delicate fossils by grinding them away

Arts said:


“Interesting. It’s essentially the same method as that used in the visible human project”

except that the visible human project didn’t destroy the specimen…

it’s a shame that this method does.. though better than not being able to study it in detail at all I suppose

You wouldn’t want to be one who has to clean up the human after a power failure though.

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Date: 5/03/2018 17:41:08
From: roughbarked
ID: 1195658
Subject: re: Revealing delicate fossils by grinding them away

Arts said:


“Interesting. It’s essentially the same method as that used in the visible human project”

except that the visible human project didn’t destroy the specimen…

it’s a shame that this method does.. though better than not being able to study it in detail at all I suppose

One does wonder if it is at all impossible to study them in a non-destructive manner.

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Date: 5/03/2018 18:02:42
From: Arts
ID: 1195676
Subject: re: Revealing delicate fossils by grinding them away

on further reading it seems the human specimens were destroyed in the process.. I stand corrected. I was int he anatomy museum today and there were quite thin slices of organs, though I suppose no .33mm.

they need to set the meat slicer to the thinnest point… :)

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