2007-01-17 04:30:18 · 5 answers · asked by david h 1 in Science & Mathematics ➔ Other - Science
They have holes through them for the same reason why many shoreline cliffs have arches and tunnels. Both are caused by wave action, and once either one of them has a "dip" eroded into them, water and abrasives tend to funnel into the dips, accelerating the process. We see other such examples in nature. For example, in windy deserts, exposed soft rock frequently have cups eroded into them, which are enlarged by trapped pepples in them tumbling around n the wind. Even at high altitudes, melting snow fields develop cups, which tend to focus sunlilght so that melting is greater in the cups than on the rims. As a general rule, uniform erosion of flat surfaces is not stable; it tends to fall into a pattern of uneven erosion which is self-reinforced.
2007-01-17 04:40:57 · answer #1 · answered by Scythian1950 7 · 0⤊ 0⤋
The holes are the product of erosion. There are naturally occurring veins of softer rock that erode faster from wave and sand action, resulting in tubes through the matrix of harder rock.
2007-01-17 12:35:48 · answer #2 · answered by poorcocoboiboi 6 · 1⤊ 0⤋
no there isn't a 'stone worm', lol, the holes are just simply worn out place on the pebbles from water, and calcim. yup.
2007-01-17 12:39:55 · answer #3 · answered by Mrs.Me 3 · 1⤊ 0⤋
not a stone worm but a molluscs called a piddock, check it out on the net
2007-01-18 18:23:08 · answer #4 · answered by colin w 1 · 0⤊ 1⤋
at least half a dozen of them
2007-01-17 13:00:21 · answer #5 · answered by Troubled Joe(the ghost of) 6 · 0⤊ 1⤋