They walked.
The rocks erode and cause sedimentary rocks, such as shale. The river will most likely cut across the rock.
you jump and press F9.
Sedimentary rocks preserve a record of the environments that existed when they formed.
When animals walk across them it can cause weathering.
create a moraine
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Dykes.
Push rocks in the slot slide across.
The rocks in Death Valley move across the Racetrack Playa surface in a mysterious manner, leaving trails behind them. It is believed that a combination of wind and thin sheets of ice allows the rocks to slide across the playa, leaving behind their distinctive trails in the mud.
Sedimentary rocks are extremely common. Many use them in small, thin pieces to make stepping stones across their yards.
They are formed from hardened lava which comes up from the ground and hardens inside the rock, which happens of course after the other rocks have already formed.
Fossils found in rocks can help scientists correlate and match rocks across different regions because specific types of fossils can provide information about the age of the rocks they are found in. By comparing the types of fossils in different rock layers, geologists can determine the relative ages of those rocks and create a timeline of events in Earth's history. This technique is known as biostratigraphy.