I had a test today and that was one of the questions. I freaked out.
2007-05-22 14:16:24 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Engineering
Doesn't anyone know? Please, please!
2007-05-22 14:21:48 · update #1
Those are from when glaciers slid over them during the ice age. The underside of the glacier had a lot of sand, pebbles and rock-grit stuck in its ice and that made scratches as the glaciers moved.
Before they rebuilt Rt 3 to New Hampshire I used to go out at lunchtime from near it to look at the exposed bedrock (in the wide median) that had those parallel scratches.
The glaciers went down as far as Cape Cod where they dumped their final sand. A lot of other embedded rocks came out all over Massachusetts as the ice melted. It was a very active region for geological changes in those days.
2007-05-22 15:58:22 · answer #1 · answered by Rich Z 7 · 0⤊ 0⤋
Scratched bedrock always freaks me out too!
2007-05-22 21:34:11 · answer #2 · answered by Nature Boy 6 · 0⤊ 0⤋
The answer is ancient glacier movement, but it's more amusing to think that it's because of Teddy Kennedy's a**.
2007-05-23 03:24:36 · answer #3 · answered by Pekoe90 2 · 0⤊ 0⤋
Probably the result of glacial movement in the last ice age
2007-05-22 21:33:02 · answer #4 · answered by Colin H 5 · 1⤊ 0⤋