Comments on: Amygdules

By: Mike Caton

Mike Caton — Wed, 10 Jun 2009 23:14:19 +0000

I clicked through to your previous post about the labyrinth up there. You begin one paragraph “What amazes me more satisfyingly…” Sir, this phrase needs to make its way into science and philosophy texts. That’s a great post.

By: Andrew

Andrew — Wed, 10 Jun 2009 23:12:14 +0000

Thurston, groundwater is everywhere, even in lava beds once they cool. It brings in dissolved minerals and leaves them behind.

By: Thurston

Thurston — Wed, 10 Jun 2009 19:44:28 +0000

What is the mechanism(s) by which material infiltrates congealed lava and forms amygdules?

By: SteveN

SteveN — Wed, 10 Jun 2009 17:51:18 +0000

I’ve heard the Sibley amygdules describes as opaline, but in my experience it seems straight quartz, not even crypto-crystalline. Maybe most of the good ones have already been dug out. :(

By: Sheldon White

Sheldon White — Wed, 10 Jun 2009 16:21:35 +0000

Go down below the lower end of the deep quarry at Sibley Park and you’ll find amygdules larger than your fist!

By: Andrew

Andrew — Wed, 10 Jun 2009 16:13:27 +0000

But UK geologists are confused, probably because they're all taught French, in which amygdale means tonsils. Amygdule is based on sound scientific Greek as I explain on About.com.

By: hypocentre

hypocentre — Wed, 10 Jun 2009 06:28:48 +0000

You say amygdules, I say amygdales – US & UK: two nations divided by a common language

By: Silver Fox

Silver Fox — Wed, 10 Jun 2009 06:00:41 +0000

Those are great amygdules, I was first introduced to amygdules in field camp at Sunset Crater, Arizona.