3 Answered Questions for the topic Erosion

What processes cause basalt to form a columnar structure?

I have run across many pictures of rocks that look like almost perfectly carved columns. For example: the Twyfelfontein Organ Pipes, the Basaltic Prisms of Santa Maria Regla, and the waterfall... more


Is an underground mine collapse or a tunnel collapse called a sinkhole?

Imagine there's an underground man made structure e.g. a tunnel or an underground train station that collapses creating a depression in the surface. Would that technically be called a sinkhole?... more

How have global sedimentation rates changed over the last billion years?

Do we have a graph of how sedimentation rates changed over time?

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