Tuesday, November 7, 2017


Sights & Sites
Darvaza Gas Crater (Door to Hell) – en.wikipedia.org/wiki/Darvaza_gas_crater; natural gas field that collapsed into underground cavern, becoming natural gas crater; geologists set it on fire to prevent spread of methane gas; has been burning continuously since 1971; 226' wide & 98' deep; popular tourist attraction.

Wednesday, March 1, 2017


Sights & Sites
Richat Structure – Sahara Desert; 011-20-112-295-7242; nasa.gov/multimedia/imagegallery/image_feature_528.html ; long considered impact structure, now believed by most to be structural dome; sedimentary rock exposed in this dome ranges in age from Late Proterozoic within center to Ordovician sandstone around its edges.