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I found this rock in the rocky mountain near dried up river. Found it around pile of many rocks and this one was interesting and just want to know what makes this cavity stucture inside that rock? Its a soft rock, i tried to cratch with a penny and then some powder like line followed after cratch. Would like to know the name of the rock, too :) Picture: enter image description here

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  • $\begingroup$ your link leads to login and not to a picture,and you need to give more details of the properties of the rock. $\endgroup$ – trond hansen Nov 10 '18 at 5:43
  • $\begingroup$ Post the image directly into the forum instead of linking to an external link in order to avoid link rot. $\endgroup$ – person27 Nov 10 '18 at 6:57
  • $\begingroup$ See: meta.earthscience.stackexchange.com/a/125/56 $\endgroup$ – Keith McClary Nov 16 '18 at 5:19

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