Earth Floor
From site: Sixty-five million years ago the Earth was not the way we know it. Where now an ocean ebbs and flows, the Earth supported land plateaus. The land upon which you now stride was underneath an ocean’s tide. And…
geology
Minerals by Name
From site: Amethyst Galleries’ Mineral Gallery describes over 600 mineral species (and varieties) and more than 5000 specimens (see our new specimens last updated 09-Feb-2009, and What’s New last updated 03-Feb-2009), together with several ways of accessing these descriptions. The…