Question

discussion: rock - how did they develop?
look at the pictures below.
tell me what you think happened to each of the following rocks. what do you think help to make them develop and look like this? (in your own words)

1. rock 1

image address: https://i.pinimg.com/474x/b3/30/60/b33060d2f9be126c6c3dc3c6661055144.jpg

1. rock 2

Explanation:

1. For Rock 1: This rock shows signs of physical weathering, specifically freeze-thaw (frost) weathering and coastal wave erosion. Water likely seeped into cracks in the rock, then froze and expanded, widening the cracks over time. Coastal waves also repeatedly hit the rock, wearing away at its edges and worsening the split. The constant cycle of wetting, freezing, and wave impact broke the rock into the split shape seen.
2. For Rock 2: The image of Rock 2 is incomplete, but based on visible texture, it appears to be a sedimentary rock formed by compaction and cementation of small rock fragments, sand, or sediment over long periods. Over time, layers of sediment built up, were pressed together (compaction), and glued by mineral cements (cementation) to form solid rock. It may have also experienced minor weathering from wind or water to smooth its surfaces.

Answer:

1. Rock 1: It split due to freeze-thaw weathering (water seeping into cracks, freezing and expanding to widen cracks) combined with constant coastal wave erosion that wore away at the rock and deepened the split over time.
2. Rock 2 (partial view): It is likely a sedimentary rock formed when layers of sediment (sand, rock fragments) were compacted (pressed tightly together) and cemented (glued by mineral deposits) over thousands to millions of years; minor surface weathering may have smoothed its outer edges.