A sluice box separates gold from sand and gravel as the gold catches on the ridges in the bottom.
mid-ocean ridges
When molten lava is coming out of the mid-ocean ridges, it turns to solid rock. The solid rock pushes the land that's already there, so more land will come. That separates the continents, so it was important for geologists to study that.
eskers
It is a center at the bottom of the ocean that occurs at mid-ocean ridges
They are formed by streams that deposited minerals that flowed on top of glaciers, inside the cracks of glaciers, and in tunnels below glaciers
When panning for gold, the miner scoops up gravel and sediment from the bottom of a stream or other likely spot. Swirling the water around in the pans moves the gravel out of the way and traps the gold, which is heavier than most rocks, against the ridges built into the bottom of the gold pan.
Moraine.
Moraine.
eskers
It is a center at the bottom of the ocean that occurs at mid-ocean ridges
mid-ocean ridges