Changes

'''System:''' [[Stratigraphic trap]]s

'''System:''' [[Stratigraphic trap]]s

 

:'''Regime:''' Erosional traps  

* '''Regime:''' Erosional traps

:Form as a result of erosional processes

* Form as a result of erosional processes

::'''Class:''' Truncation traps

 

::Up-dip reservoir boundary created by truncation of a reservoir beneath an unconformity, followed by deposition of sealing unit on top of an unconformity. The unconformity surface provides top seal, but closure usually requires the presence of depositional or tectonic side and bottom seals beneath the unconformity.

<list-item>'''Class:''' Truncation traps</list-item><list-item>Up-dip reservoir boundary created by truncation of a reservoir beneath an unconformity, followed by deposition of sealing unit on top of an unconformity. The unconformity surface provides top seal, but closure usually requires the presence of depositional or tectonic side and bottom seals beneath the unconformity.

:::'''Subclass:''' Regional subcrop

 

:::Uniformly or gently dipping reservoir bed beneath an unconformity. Top seal is provided by postunconformity beds; bottom seal is provided by sealing units beneath reservoir.

<list-item>'''Subclass:''' Regional subcrop</list-item><list-item>Uniformly or gently dipping reservoir bed beneath an unconformity. Top seal is provided by postunconformity beds; bottom seal is provided by sealing units beneath reservoir.</list-item><list-item>'''Subclass:''' Paleostructural subcrop</list-item><list-item>Folded and/or faulted reservoir beds beneath postdeformation unconformity.</list-item><list-item>Reservoir distribution and trap boundaries are controlled by preunconformity deformation and subsequent erosion.</list-item></list-item><list-item>'''Class:''' Erosional relief traps</list-item><list-item>Closure provided by topographic relief beneath an unconformity.

:::'''Subclass:''' Paleostructural subcrop

 

:::Folded and/or faulted reservoir beds beneath postdeformation unconformity.

<list-item>'''Subclass:''' Buried hill</list-item><list-item>Top-seal closure created by positive erosional relief of reservoir beneath a sealing unconformity surface.</list-item><list-item>'''Subclass:''' Truncation edge</list-item><list-item>Side seal provided by truncation of a reservoir against later erosional valley, channel, or gorge wall and subsequent deposition of sealing beds in valley, channel, or gorge.</list-item></list-item>

:::Reservoir distribution and trap boundaries are controlled by preunconformity deformation and subsequent erosion.

::'''Class:''' Erosional relief traps

::Closure provided by topographic relief beneath an unconformity.

:::'''Subclass:''' Buried hill

:::Top-seal closure created by positive erosional relief of reservoir beneath a sealing unconformity surface.

:::'''Subclass:''' Truncation edge

:::Side seal provided by truncation of a reservoir against later erosional valley, channel, or gorge wall and subsequent deposition of sealing beds in valley, channel, or gorge.

==Families==

==Families==