Sentences with phrase «deposits on some cave walls»
Not exact matches
If they made any paintings on the cave walls 100,000 years ago, calcium carbonate deposits would have obscured them, so the team plans to beam X-rays through the layers to see if our ancestors left traces of loftier artistic ambitions.
http://discovermagazine.com/
The caves form in limestone although there may be bands of shale or chert visible in the cave walls along with mud, sand and boulder deposits on the cave floor.