Understanding through Discussion

Welcome! You are not logged in. [ Login ]
EvC Forum active members: 85 (8915 total)
Current session began: 
Page Loaded: 07-18-2019 7:28 AM
423 online now:
Admin (Percy), vimesey (2 members, 421 visitors)
Chatting now:  Chat room empty
Newest Member: 4petdinos
Post Volume:
Total: 856,902 Year: 11,938/19,786 Month: 1,719/2,641 Week: 228/708 Day: 3/52 Hour: 1/0

Thread  Details

Email This Thread
Newer Topic | Older Topic
Author Topic:   Introduction To Geology
Member (Idle past 1970 days)
Posts: 652
From: Puyallup, WA.
Joined: 02-04-2003

Message 192 of 293 (681112)
11-22-2012 4:44 PM
Reply to: Message 184 by Dr Adequate
10-15-2012 11:57 AM

Re: Cross-Cutting Relationships
The brown sedimentary rocks (A) must be younger than the dike (B)

I think you may have made a mistake here. The intrusion can't be older than what it intrudes into.

you're correct below.

Why must a dike or similar intrusion be younger than the rock into which it intrudes? Because a sheet of molten rock would not stand up by itself.

This message is a reply to:
 Message 184 by Dr Adequate, posted 10-15-2012 11:57 AM Dr Adequate has responded

Replies to this message:
 Message 193 by Dr Adequate, posted 11-23-2012 2:37 AM DBlevins 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