Jump to content
Science Forums

Rocks: Fine-grained/Coarse-grained texture?


kingwinner

Recommended Posts

1) If a rock has a fine-grained texture, what does it mean? Does it mean that it has small crystals? And coarse-grained texture means large crystals? The word "texture" used here...is it related how the surface of the rock looks like, how you feel when you touch the rock?

 

2) Is the term "phaneritic texture" the same as "coarse-grained texture", i.e. big crystals??

If so, then why in the following rock description, the rock syenite (#3) is under the category "phaneritic texture", but in its description, it is described as "fine-grained"? Then why would it be under the "phaneritic texture" category? :shrug:

Please click the following link to see the chart:

http://www.geocities.com/asdfasdf23135/DSC00601.JPG

 

Can anyone help? Thank you!

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
×
×
  • Create New...