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Ted37

Fossil or Rock

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Ted37

I came across this recently. Looks kind of interesting. I cannot tell if its quartz or what. It is hard. Any chance it could be a fossil?

IMG_20190505_122627171.jpg

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Ted37

Another Pic

IMG_20190505_122701716.jpg

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Ted37

One More

IMG_20190505_122819614.jpg

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Ted37

Its about 3/4 an inch. 

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Misha

Does not look like anything I know of that would be a fossil, probably just quartzite.

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Bronzviking

It does have a suggestive shape but I'm not seeing fossil or bone. I Agree with quartzite.

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ynot

Looks like it may be a piece of petrified wood.

 

To answer Your question, it is both fossil and rock. (Maybe).

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Aurelius

I suspect this is a piece of rock called slickenside, which is formed by friction between two sides of a geological fault.

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ynot
1 hour ago, Aurelius said:

I suspect this is a piece of rock called slickenside, which is formed by friction between two sides of a geological fault.

This is a stream tumbled piece so any evidence of a surface feature like "slickensides" would have been erased.

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Rockwood
7 hours ago, ynot said:

Looks like it may be a piece of petrified wood.

 

To answer Your question, it is both fossil and rock. (Maybe).

Wood is fairly common at that site, but it looks nothing like that. It has a black, carbonized, appearance.

It seems unlikely that wood preserved in such a different manner would be found there. Doesn't it ?

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Rockwood
5 hours ago, ynot said:

surface feature like "slickensides"

There is a quarry near here with slickensides as thick as this whole piece. The layer looks nothing like this though.

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ynot
5 hours ago, Rockwood said:

There is a quarry near here with slickensides as thick as this whole piece. The layer looks nothing like this though.

My understanding of "slickensides" is that they are markings left on the surface of rocks as they are sliding past each other under pressure.  They are a surface feature of this movement, like the marks left by a file.

 

Could the piece in question be an erratic, dropped by a glacier, river or person?

@Ted37 - Does the piece fizz when vinegar is applied?

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FranzBernhard

Slickensides - Slickenfibres:

https://en.wikipedia.org/wiki/Slickenside

There is also a nice pic of rather massive slickenfibres in this wikipedia entry.

Franz Bernhard

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Rockwood

Okay. On a technicality. :rolleyes:

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