Vrigin Anticline:Ridge of blue clay (volcanic ash), petrified forrest member, upper triassic
Amazingly, this 80m high hill of soft volcanic ash derived clay survived erosion. Although it referred to as blue clay, it comes in many colors, all of the having the nasty property of swelling when wet, not good to build on. Just recently the runway of the local airport had to be completely redone because it was built on blue clay....
A hard layer of paleosoil is visible just below the intense red layers. It is hard petrified jasperoid peat that formed between volcanic eruptions, and stretches for several hundred meters across the picture.
Vrigin Anticline:Ridge of blue clay (volcanic ash), petrified forrest member, upper triassic
Amazingly, this 80m high hill of soft volcanic ash derived clay survived erosion. Although it referred to as blue clay, it comes in many colors, all of the having the nasty property of swelling when wet, not good to build on. Just recently the runway of the local airport had to be completely redone because it was built on blue clay....
A hard layer of paleosoil is visible just below the intense red layers. It is hard petrified jasperoid peat that formed between volcanic eruptions, and stretches for several hundred meters across the picture.