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Tell me more, I’ll get better.
Sign up and I'll remember your taste, your people & your saves.
© 2026 Go Playfully Inc
✨"in some places this wall is as slick and shiny as glass"
🪨Learn the word 'slickenside' while you're here
👀Look for buckled sedimentary layers in the rock
Ancient chert rock from the Corona Heights Fault, polished mirror-smooth by millions of years of tectonic pressure. The diagonal striations trace the fault's slip, and in spots, silica gel makes it shimmer like glass.
Ancient rock formation
Geological wonder
Slickenside exposure
Hidden city gem
✨"in some places this wall is as slick and shiny as glass"
🪨Learn the word 'slickenside' while you're here
👀Look for buckled sedimentary layers in the rock
Ancient chert rock from the Corona Heights Fault, polished mirror-smooth by millions of years of tectonic pressure. The diagonal striations trace the fault's slip, and in spots, silica gel makes it shimmer like glass.
Ancient rock formation
Geological wonder
Slickenside exposure
Hidden city gem