abstract banded sedimentary sand and mud stone rocks

rock geology formation cliff bedrock abstract patterns banded sedimentary rocks cornish cliffs north cornwall sediment sand mud stone beds south west footpath cornwall mineralogy marine deposits folding cross-bedding mudstones ancient environments boundary sandstones compacted rock fault weathering laminated water-lain siltstone layers mudstone bude formation cliff stratification stone millennia stratify geological sedimentary dry orange geology sandstone weathered detail nature closeup natural design rough surface brown textured pattern abstract old texture background