Changes

The proposed classes in the fold trap regime are monocline, local dome, regional dome, local nose, regional nose, local anticline, regional anticline, and syncline. The following outline shows the classes, some of the subclasses, style, and their definitions. The Subclasses listed are not inclusive but represent the more common types of fold traps and show how the proposed classification scheme can be developed and defined.

The proposed classes in the fold trap regime are monocline, local dome, regional dome, local nose, regional nose, local anticline, regional anticline, and syncline. The following outline shows the classes, some of the subclasses, style, and their definitions. The Subclasses listed are not inclusive but represent the more common types of fold traps and show how the proposed classification scheme can be developed and defined.

'''Regime:''' Fold

'''Regime:''' Fold<br />

 

A fold trap is formed by syn- or postdepositional processes that deform geological surfaces into a curved or nonplanar arrangement (Biddle and Weilchowsky, 1995).

A fold trap is formed by syn- or postdepositional processes that deform geological surfaces into a curved or nonplanar arrangement (Biddle and Weilchowsky, 1995).

 

:'''Class:''' Monocline

* '''Class:''' Monocline

:A fold that occurs where strata dip or flex from the horizontal in one direction only and are not a part of a anticline or syncline.<ref name=ch02r11>Rittenhouse, G., 1972, Stratigraphic-trap classification, in King, R., E., ed., Stratigraphic Oil and Gas Fields: AAPG Memoir 16, p. 14–28.</ref> A monocline can form only part of the trap closure and must combine with other elements for closure.

* A fold that occurs where strata dip or flex from the horizontal in one direction only and are not a part of a anticline or syncline.<ref name=ch02r11>Rittenhouse, G., 1972, Stratigraphic-trap classification, in King, R., E., ed., Stratigraphic Oil and Gas Fields: AAPG Memoir 16, p. 14–28.</ref> A monocline can form only part of the trap closure and must combine with other elements for closure.

:'''Class:''' Regional nose

* '''Class:''' Regional nose

:A short plunging anticline without closure. A trap where a nose is a trapping element must combine with other elements to have closure.

* A short plunging anticline without closure. A trap where a nose is a trapping element must combine with other elements to have closure.

:'''Class:''' Local nose

* '''Class:''' Local nose

:'''Class:''' Regional dome

* '''Class:''' Regional dome

:Circular or elliptical anticline many miles (km) in diameter.

* Circular or elliptical anticline many miles (km) in diameter.

:'''Class:''' Local dome

* '''Class:''' Local dome

:Circular or elliptical anticline

* Circular or elliptical anticline

:'''Class:''' Regional anticline

 

:Elongate convex upward fold.

* '''Class:''' Regional anticline

:'''Class:''' Local anticline

* Elongate convex upward fold.

::'''Subclass:''' Simple

* '''Class:''' Local anticline

::'''Subclass:''' Fault bounded or cross faulted

 

:::'''Styles:''' Relief, symmetry, internal faulting, internal geometry

<list-item>'''Subclass:''' Simple</list-item><list-item>'''Subclass:''' Fault bounded or cross faulted

:'''Class:''' Syncline

 

:Elongate concave upward fold.

<list-item>'''Styles:''' Relief, symmetry, internal faulting, internal geometry</list-item></list-item>

* '''Class:''' Syncline

* Elongate concave upward fold.

==Families==

==Families==