Photos of Seismites in Pleistocene lakebed deposits, SE California
Seismites are a type of soft-sediment deformation that are demonstrably the result of shaking. This shaking is generally considered to be caused by Earthquakes.

photo of seismite

Photo of seismites in Pleistocene Lakebeds

This next photo is a close-up of seismites from the one above.
Close-up view of seismites