Recent content by Lady Iris

Here's one I've been reviewing for use in my Physical Geology course for non-geoscientists, and I found it very nice. Easily readable, especially for a layperson, and very comprehensive. It's more about the evolution of the biosphere rather than the study of paleontology, per se, but there's a...

Continental crust formation is still not well understood - especially those continents/parts of continents (called Archean) where the oldest crystals have been found/dated (3.8+ b.y. old). But what I sense that you're really asking is compositional differences as measured by density - if...