pebbles from a beach in the uk.why the holes and what has made them?
2006-06-28 10:18:16 · 7 answers · asked by jean c 3 in Science & Mathematics ➔ Other - Science
Rock is made when lava cools. If that lava had gases dissolved in it, as it cools the gas escapes, like bubbles in a glass of coke. As rock is really solid, as it cools it sets. Trapping the bubbles inside, the same way the bubbles from baking powder make bread rise.
2006-06-28 10:36:55 · answer #1 · answered by philskiuk 1 · 0⤊ 0⤋
A lot of tiny little "air bubble" holes are made when the lava cools down.
Several holes of different sizes (from tiny to up to 1 inch) are made by a species of a shellfish (the so-called sea-date) which literally drills itself in the stone.
2006-06-28 17:47:50 · answer #2 · answered by Ymmo the Heathen 7 · 0⤊ 0⤋
I was looking at that a while ago, cos I live just off the beach in the UK. I reckon they're from hundreds of years ago, like when an old stone age man made his girlfriend a stone necklace to try and win over her love. And they lived happily ever after until one day she fell into a river and drowned, and her necklace died with her.
2006-06-28 17:24:18 · answer #3 · answered by floppity 7 · 0⤊ 0⤋
Probably a thread of stone that was chemically slightly different, so dissolved more easily in water/brine, leaving a hole where the thread used to be.
2006-06-28 17:23:56 · answer #4 · answered by Neil the Hat 5 · 0⤊ 0⤋
Presumably they are made by erosion - some small piece of grit or something being pressed against the pebble e.g. by water.
2006-06-28 17:23:24 · answer #5 · answered by Older&Wiser 5 · 0⤊ 0⤋
maybe a creature lived in them,or corrosion from the sand salt and water
2006-06-28 17:22:54 · answer #6 · answered by janet 3 · 0⤊ 0⤋
dont know-meant to bring good luck tho
2006-06-28 17:23:37 · answer #7 · answered by Anonymous · 0⤊ 0⤋