For Unconformity we have terms and definitions in 7 topics. The topics are Anthromorphemics, Anthropology, Geologic, Hunting, Physical Geography, Speleological and Volcano.

Unconformity (Anthromorphemics)

The surface of a stratum that represents a break in the stratigraphic sequence.

Unconformity (Anthropology)

The surface of a stratum that represents a break in the stratigraphic sequence.

Unconformity (Geologic)

The contact between older rocks and younger sedimentary rocks in which at least some erosion has removed some of the older rocks before deposition of the younger. An angular unconformity shows that the older rocks have been deformed and eroded before the younger sedimentary rocks were deposited; there is an angle between the beds of the older and the younger.

Unconformity (Hunting)

A surface that represents a break in the geologic record, with the rock unit immediately above it being considerably younger than the rock beneath. There are three major aspects to consider: (1) Time. An unconformity develops during a period of time in which no sediment is deposited. This concept equates deposition and time, and an unconformity represents unrecorded time. (2) Deposition. Any interruption of deposition, whether large or small in extent, is an unconformity. This aspect of unconformity pre-supposes a standard ‘scale’ of deposition which is complete. Major breaks in sedimentation can usually be demonstrated easily, but minor breaks may go unrecorded until highly detailed investigations are made. (3) Structure. Structurally, unconformity may be regarded as planar structures separating older rocks below from younger rocks above, representing the ‘break’ as defined in (1) and (2) above. A plane of unconformity may be a surface of weathering, EROSION or denudation, or a surface of non-deposition, or possibly some combination of these factors. It may be parallel to the upper strata, make an angle with the upper strata, or be irregular. Subsequent Earth movements may have folded or faulted it.

Unconformity (Physical Geography)

A break in the sequence of sedimentary strata. Often the unconformity surface is the result of erosion.

Unconformity (Speleological)

A time break in a depositional sequence.
Geology.

Unconformity (Volcano)

A substantial break or gap in the geologic record where a rock unit is overlain by another that is not next in stratigraphic sucession, such as an interruption in continuity of a depositional sequence of sedimentary rocks or a break between eroded igneous rocks and younger sedimentary strata. It results from a change that caused deposition to cease for a considerable time, and it normally implies uplift and erosion with loss of the previous formed record.

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