Ever found sea shells with little holes drilled in them

jamesp
Cave Dweller

Member since October 2012
Posts: 36,616

Ever found sea shells with little holes drilled in them Jun 13, 2013 7:38:05 GMT -5

Quote

Post by jamesp on Jun 13, 2013 7:38:05 GMT -5

Holes like these are from modern day clionid sponges

Silicified fossilized oyster examples of likely clionid damage:

Never knew these were silicified on the inside.Bought a few home from last trip.Only collected the ones w/minimal clionid damage.
Will be in pursuit of drilled ones for their beauty(in my eyes)

Fossilized oyster with out holes( i think this is calcified):

Death plate with same oysters showing bore hole damage most likely from clionid sponges

Pat misunderstood rock expert Member since February 2012 Posts: 11,838	Ever found sea shells with little holes drilled in them Jun 13, 2013 9:24:35 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by Pat on Jun 13, 2013 9:24:35 GMT -5 Wow! Didn't know a sponge had such absorption power all the way to sucking/drilling! So a sponge (which is full of holes itself) can create a its own image in another creature. Interesting.
	Pat

panamark
fully equipped rock polisher

Member since September 2012
Posts: 1,343

Ever found sea shells with little holes drilled in them Jun 13, 2013 9:43:41 GMT -5

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Post by panamark on Jun 13, 2013 9:43:41 GMT -5

There are also sea worms that account for a lot of the holes in shells (to eat them). And some shellfish (esp. whelks) can bore into other shells in order to eat them. But it sounds like the sponges are "the worst" in that they drill multiple holes while the others are single holes.

- Mark

Trying to see the potential in everyone and every rock.

Fossilman Cave Dweller Member since January 2009 Posts: 20,723	Ever found sea shells with little holes drilled in them Jun 13, 2013 10:29:02 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by Fossilman on Jun 13, 2013 10:29:02 GMT -5 Dang James thats cool! I need to come and play in your shop too!Gotta love "Mother Nature",she has the coolest stuff!!!
	God,family and life.....

jakesrocks
In Memoriam

RIP Don Woodward AKA jakesrocks

Member since April 2010
Posts: 12,696

Ever found sea shells with little holes drilled in them Jun 13, 2013 10:40:54 GMT -5

Quote

Post by jakesrocks on Jun 13, 2013 10:40:54 GMT -5

Some shells also have a natural hole in one of the valves. A cord extends from the hole to anchor the shell to a rock or other anchor point. A natural hole will be found near or at the hinge.

Last Edit: Jun 13, 2013 10:43:33 GMT -5 by jakesrocks

Don --- USN Retired

jamesp Cave Dweller Member since October 2012 Posts: 36,616	Ever found sea shells with little holes drilled in them Jun 23, 2013 8:43:48 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by jamesp on Jun 23, 2013 8:43:48 GMT -5 I will look for that anchor string hole when rock season starts Don.Oysters anchor on everything.I will check the oyster fossils.

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Ever found sea shells with little holes drilled in them

Post by jamesp on Jun 13, 2013 7:38:05 GMT -5

Post by Pat on Jun 13, 2013 9:24:35 GMT -5

Post by panamark on Jun 13, 2013 9:43:41 GMT -5

Post by Fossilman on Jun 13, 2013 10:29:02 GMT -5

Post by jakesrocks on Jun 13, 2013 10:40:54 GMT -5

Post by jamesp on Jun 23, 2013 8:43:48 GMT -5

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