5,493 followers
5,493 followers
@GraceArockin @TrilbySmith2 Its igneous rock. That has been chemically confirmed to be from a volcano. https://t.co/HwizLORT4B
83 followers
RT @USGS: Happy Birthday Devils Tower National Monument (Sept 24, 1906) https://t.co/kPme100xpb https://t.co/rTemTpwew0
2,589 followers
RT @Geology_History: One of most mysterious features on Earth, & not just because supposed meeting point with #Aliens, but its origin is st…