Replies

Excuse me, but the Grand Canyon cuts through the following formations (from top to bottom):

Kaibab limestone - up to 320' thick
Toroweap Formation - red and yellow sandstones with some limestone
Coconino sandstone - about 400' thick
Hermit shale - 100 to 300' thick with some sandstones
Supai Group - 1000' thick sequence of alternating red crossbedded sandstones and shales
Suprise Canyon Formation - crossbedded sandstones and conglomerates
Redwall limestone - 600' thick massive blue-grey limestones
Temple Butte limestone - 50 to 100' thick bed of lavendar to purple sandstone
Tonto Group - 750 to 1100' thick sequence of limestones and shales
Dox sandstone - up to 1700' thick sequence of sandstones and some shales
Shinumo Quartzite - up to 1100' thick massive quartzite bearing cross bedding and ripple marks
Hakatai shale - 800' thick deposit of mudstones, shales and sandstone
Bass limestone - up to 200' thick grey dolostones interbedded with shales and sandstones
Zoroaster Granite - unknown total thickness
Vishnu schist - metamorphosed sedimentary rock, total thickness also unknown

History of the Grand Canyon (scroll down to see stratigraphic sequence)

That's an awful lot of sandstone, wouldn't you agree? Also, wouldn't you agree that with that much sandstone, a massive electrical discharge just might leave some traces of fulgarites? I mean, glass is made of sandstone...

I am in your debt for your detailed account of the many layers the Grand Canyon. And yes, there sure is plenty of sandstone there to fuse into glassy fulgurites when zapped by Cosmic lighning bolts that "medved" asserts were the cause of the Canyon.

So, we are back to "where are the fulgurites?" IOW, absent fulgurites in the sandstone formations making up the Grand Canyon, one would have to reject the Cosmic Lightning Bolt hypothesis for the formation of the Grand Canyon, wouldn't we?

That's an awful lot of sandstone, wouldn't you agree? Also, wouldn't you agree that with that much sandstone, a massive electrical discharge just might leave some traces of fulgarites?...

Not if the electrical discharge in question is the wrong kind (anode vs cathode scarring). The other thing I could mention is that lightning strikes which leave fulgarites are on a much smaller scale than the thing I am describing and that could easily have something to do with it.