Understanding through Discussion


Welcome! You are not logged in. [ Login ]
EvC Forum active members: 85 (8937 total)
24 online now:
(24 visitors)
Chatting now:  Chat room empty
Newest Member: ssope
Happy Birthday: AdminPhat
Post Volume: Total: 861,822 Year: 16,858/19,786 Month: 983/2,598 Week: 229/251 Day: 58/59 Hour: 0/2


Thread  Details

Email This Thread
Newer Topic | Older Topic
  
Author Topic:   Exploring the Grand Canyon, from the bottom up.
The Matt
Member (Idle past 3800 days)
Posts: 99
From: U.K.
Joined: 06-07-2007


Message 200 of 283 (435705)
11-22-2007 1:52 PM
Reply to: Message 199 by jar
11-22-2007 1:17 PM


Re: What is the layer above the Dox formation?
Andesite is a different type of lava. It has a different mineral composition to basalt (less silica, most significantly), and is generally a good deal thicker, leading to steeper volcanoes and more explosive eruptions.

Andesite
Basalt
Also see here

{Note from Adminnemooseus - Re: "(less silica, most significantly)." - The Matt is ambiguous about which volcanic type this refers to. It would refer to basalt. Andesite has more silica that basalt.}

Edited by Adminnemooseus, : See note above.


This message is a reply to:
 Message 199 by jar, posted 11-22-2007 1:17 PM jar has responded

Replies to this message:
 Message 201 by jar, posted 11-22-2007 1:54 PM The Matt has not yet responded

  
Newer Topic | Older Topic
Jump to:


Copyright 2001-2018 by EvC Forum, All Rights Reserved

™ Version 4.0 Beta
Innovative software from Qwixotic © 2019