Amboy Crater

Amboy Crater is the jet-black nested cinder cone of an extinct volcano surrounded by a 27sq mile lava field in the heart of the Mojave Desert. It was designated a National Natural Landmark in 1973 and last erupted 10,000 years ago. This photo was made overlooking Bristol Lake, a playa or dry lake bed, to the east of the crater. 

http://www.blm.gov/style/medialib/blm/ca/pdf/needles/pubs.Par.68625.File.dat/Amboy_Crater.pdf