identifier |
naming _system |
description |
source |
source _reference |
version |
status |
|
naming _system .identifier |
|
|
|
ref _version .identifier |
|
top |
POSC basic |
The highest point, level or part of something. this does not distinguish between the physical top and the stratigraphic top. |
POSC |
Websters |
epicentre 2.2 |
provisional |
physical top |
POSC basic |
The highest point at the present time. This may be the stratigraphic base of an overturned bed. |
POSC |
|
epicentre 2.2 |
provisional |
stratigraphic top |
POSC basic |
The latest depositional part. |
POSC |
|
epicentre 2.2 |
provisional |
base |
POSC basic |
The lowest point. No distinction is made between physical base and stratigraphic base. |
POSC |
Websters |
epicentre 2.2 |
provisional |
physical base |
POSC basic |
The lowest point at the present time. This may be the stratigraphic top of an overturned bed. |
POSC |
|
epicentre 2.2 |
provisional |
stratigraphic base |
POSC basic |
The part initially deposited. |
POSC |
|
epicentre 2.2 |
provisional |
near the top |
POSC basic |
A zone or point approaching the highest level of a feature but not exactly or identifiably coinciding with that position. |
POSC |
|
epicentre 2.2 |
provisional |
near the base |
POSC basic |
A zone or point approaching the lowest level of a feature but not exactly or identifiably coinciding with that position. |
POSC |
|
epicentre 2.2 |
provisional |
interbedded |
POSC basic |
Said of beds lying between or alternating with others of different character. |
POSC |
AGI Glossary of Geology |
epicentre 2.2 |
provisional |
onlap |
POSC basic |
A base-discordant relation in which initially horizontal strata terminate progressively against an initially inclined surface, or in which initially inclined strata terminate progressively updip against a surface of greater initial inclination. |
POSC |
Glossary of Seismic Stratigraphy |
epicentre 2.2 |
provisional |
downlap |
POSC basic |
A base-discordant relation in which initially inclined strata terminate downdip against an initially horizontal or inclined surface. |
POSC |
Glossary of Seismic Stratigraphy |
epicentre 2.2 |
provisional |
toplap |
POSC basic |
Termination of strata against an overlying surface mainly as a result of nondeposition with perhaps only minor erosion. |
POSC |
Glossary of Seismic Stratigraphy |
epicentre 2.2 |
provisional |
truncation |
POSC basic |
Termination of strata or seismic reflections interpreted as strata along an unconformity surface due to post-depositional erosional or structural effects. |
POSC |
Glossary of Seismic Stratigraphy |
epicentre 2.2 |
provisional |
fault intersection |
POSC basic |
Termination of strata or seismic reflections interpreted as strata along a fault surface. |
POSC |
|
epicentre 2.2 |
provisional |
upthrown restored top |
POSC basic |
An upthrown restored top is the estimated top the formation would have had in the upthrown block if the formation had not been faulted out. |
POSC |
Subsurface Geologic Mapping |
epicentre 2.2 |
provisional |
downthrown restored top |
POSC basic |
An downthrown restored top is the estimated top the formation would have had in the downthrown block if the formation had not been faulted out. |
POSC |
Subsurface Geologic Mapping |
epicentre 2.2 |
provisional |
pinch-out |
POSC basic |
The termination or end of a stratum, vein, or other body of rock that narrows or thins progressively in a given horizontal direction until it disappears and the rocks it once separated are in contact. |
POSC |
AGI Glossary of Geology |
epicentre 2.2 |
provisional |
spillpoint |
POSC basic |
The point of maximum filling of a structural trap by oil or gas. |
POSC |
AGI Glossary of Geology |
epicentre 2.2 |
provisional |
trap |
POSC basic |
Any barrier to the upward movement of oil or gas, allowing either or both to accumulate. A trap includes a reservoir rock and an overlying or updip impermeable roof rock. |
POSC |
AGI Glossary of Geology |
epicentre 2.2 |
provisional |
identifier |
naming _system |
description |
source |
source _reference |
version |
status |
boundary stratotype |
POSC basic |
A specific point in a specific sequence of rock strata that serves as a standard for definition and recognition of a stratigraphic boundary. |
POSC |
AGI Glossary of Geology |
epicentre 2.2 |
provisional |
type section |
POSC basic |
The originally described sequence of strata that constitute a stratigraphic unit. It serves as an objective standard with which spatially separated parts of the unit may be compared, and it is preferably in an area where the unit shows maximum thickness and is completely exposed (or at least shows top and bottom) |
POSC |
AGI Glossary of Geology |
epicentre 2.2 |
provisional |
absent by faulting |
POSC basic |
Strata that is absent from a subsurface rock segment due to faulting. |
POSC |
|
epicentre 2.2 |
provisional |
absent by erosion |
POSC basic |
Strata that is absent from another geologic object due to erosion. |
POSC |
|
epicentre 2.2 |
provisional |
absent reason unknown |
POSC basic |
Strata that is absent from another geologic for unknown reasons. |
POSC |
|
epicentre 2.2 |
provisional |
hanging wall |
POSC basic |
The overlying side of a fault. For a normal fault, the hanging wall is the downthrown side. For a reverse fault, the hanging wall is the upthrown side. |
POSC |
|
epicentre 2.1 |
current |
footwall |
POSC basic |
The underlying side of a fault. For a normal fault, the footwall is the upthrown side. For a reverse fault, the footwall is the downthrown side. |
POSC |
|
epicentre 2.1 |
current |