Folds                                Faults

 


 

-Stage 2.1-

Folds

 

There are many types of fold that a geologist could study. These include:

 

An Anticline

A Syncline

Plunging Folds

and Non-symmetrical Folds.

 

You should also be aware of how to name folds,

 

but before going into those, you need to understand some basic geologic map skills.


Geologic Rock Units

Geology Legend

  • The list on the left is representative of a geologic map legend
  • Rocks on maps are listed in age order
  • The rocks on the top of the list are the youngest
  • The one's on the bottom are the oldest
  • This resembles real-life where rocks are deposited, then the "younger rocks" are deposited later on top of them
  • These rock units will be used in the proceeding pictures

 

 

 

 


Anticline

Anticline

 

 


Syncline

Syncline

 

 


Plunging Folds

Plunging Sycline and Plunging Anticline

Plunging Syncline                                                    Plunging Anticline 


Non-Symmetrical Folds

Non-symmetrical Anticline

 

 

 

Non-Symmetrical Anticline                   


Identifying Folds

When identifying folds there are 3 types of qualifiers that would normally be used for a complete description:

 

Anticline or Syncline

Symmetrical or Non-symmetrical

Plunging or Non-plunging

(typically you don't say "non-plunging", you would just leave off that term)

Examples:

Plunging Symmetrical Anticline

Non-symmetrical Syncline