2007-03-24 02:03:10 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Earth Sciences & Geology
It very well could be a lava rock such as pumice or scoria. They are igneous rocks that are violently expelled from volcano's. The gas escapes the magma as it cools and little holes and cracks develop. Maybe it just appears to be a fossil. If you want to send me a pic i should be able to tell you. josh_maurer2002@yahoo.com
2007-03-24 05:24:40 · answer #1 · answered by josh_maurer2002 4 · 0⤊ 0⤋
I am not sure you have correctly identified your rock as a lava rock. But let's assume that you have. Perhaps the lava poured out onto a beach, covering a layer of shells--possibly incinerated by the lave but leaving imprints. On the other hand, perhaps, after the lava solidified, some rock boring clams (bivalves that make holes in rocks) or other critters, decided to make a home in the rock. Check out the photo of Penitella clams at this website: http://www.biosbcc.net/ocean/marinesci/02ocean/mgbottom.htm
It is rare for fossils to be preserved in volcanic rocks--but it can happen:
here's a site talking about a spider fossilized in volcanic ash: http://www.sciencedaily.com/releases/2004/10/041022105150.htm
In Hawaii, some fossils have been found in lavatubes--not quite the same as being in the rocks,however. http://hvo.wr.usgs.gov/volcanowatch/2000/00_01_20.html
And animal and human footprints have been found in hardened "ash"(which is not the same as hardened lava).
Here's an interesting article about coral and shells in tsunami deposits that were deposited on volcanic rocks and later covered by more volcanic rocks.http://environment.newscientist.com/article/mg18324641.900
2007-03-24 04:20:33 · answer #2 · answered by luka d 5 · 0⤊ 0⤋
It must be a sedimentary rock, not an igneous rock. An igneous rock is formed from cooling magma/lava which has a temperature of over 2000 degrees C and would destroy a fossil.
2007-03-24 04:01:00 · answer #3 · answered by mikeed14 3 · 0⤊ 0⤋
If it is a sediment it could be ether sandstone or Fossiliferous sandstone. Lava rock has a very high temperature when created. but if you bought it and a fossil was placed in it then it could be a any type of igneous/volcanic type of rock.
2007-03-27 10:49:36 · answer #4 · answered by giictexfxerx :) 2 · 0⤊ 0⤋
Lava not have fossil in it. You have fake, da kine make in Taiwan. Mebee you learn bedda English OK brudda? Mahalo
2007-03-24 03:13:12 · answer #5 · answered by rico3151 6 · 0⤊ 2⤋
It must be that new lava that forms at room temperature.
2007-03-24 03:11:21 · answer #6 · answered by Now and Then Comes a Thought 6 · 0⤊ 1⤋
must be a sedimentary rock - they have many fossils found inside them
2007-03-24 04:17:15 · answer #7 · answered by Anonymous · 0⤊ 0⤋