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Comments by OnanTheLibrarian


2. Sea floor records ancient Earth

Comment #198374 by OnanTheLibrarian on June 23, 2008 at 4:55 pm

"The ophiolite structure was mapped between outcrops covering 4-5km (2.5-3 miles) and shows the correct sequence of layers found in an ophiolite, except the lowest mantle portion."

"Crucially, they show well preserved sheeted dykes and pillow lavas, clear evidence to many that these are the ancient remains of sea floor created by processes seen today."

This is quite interesting given past portrayals of Archean crust. The pillow lavas don't mean much (Hawaii is not on a spreading ridge), but the ophiolite sequence and sheeted dykes seem to nail it down. Is there any igneous environ that will produce sheeted dykes and pillow lavas without commensurate subduction?

If plate tectonics occurred in similar fashion as today except at differing rates and thicknesses, then we have new perspective on post-collisional tectonics through examining unroofed batholithic Archean terranes.

3. Christian Founders 3D Adventure Computer Game

Comment #185840 by OnanTheLibrarian on May 28, 2008 at 7:19 pm

@ Johnny and Rod:

I converted all of them! No Atheists in my game!