Surface bedrock in British Columbia often has long, parallel scratches called striations. Which of the following is most likely TRUE about these markings:
W) they were caused by seasonal freeze-thaw cycles
X) a glacier once moved in the direction of these scratches
Y) a swift river once ran through these areas
Z) the area was once a pluvial lake
✔️Answer:X) A GLACIER ONCE MOVED IN THE DIRECTION OF THESE SCRATCHES
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