1. https://data.geoscience.fr/ncl
  2. GeolUnitType
  3. _14
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Entry: Allostratigraphic Unit

URI: https://data.geoscience.fr/ncl/GeolUnitType/14

Geologic unit defined by bounding surfaces. Not necessarily stratified. Donovon (2004, IUGS abstract Florence) makes good case for use of a noncommittal term for the bounding surface. While there may be no agreement that a given stratal boundary is a discontinuity, there is consensus that all the identified boundaries are stratal surfaces. Includes: 1. Unconformity bounded units (Salvador 1994), defined by bounding stratigraphic discontinuities ('significant unconformities'; unconformity is defined as surface of erosion in Salvador 1994).2. Sequence stratigraphic unit, an allostratigraphic unit that is used to interpret the depositional origin of sedimentary strata and assumes, though this is not always stated, an implicit connection to base level change. It does this by establishing how the sequence of strata accumulated in order in the sedimentary section over a subdividing framework of surfaces.

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is a Concept
category 2
changed on 7 Dec 2022 15:15:29.275
submitted byHélène Bressan
accepted on 8 Apr 2020 12:25:29.895

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date accepted 8 Apr 2020 12:25:29.895
date submitted 8 Apr 2020 12:25:14.819
definition
entity Allostratigraphic Unit
source graph graph

description
en Geologic unit defined by bounding surfaces. Not necessarily stratified. Donovon (2004, IUGS abstract Florence) makes good case for use of a noncommittal term for the bounding surface. While there may be no agreement that a given stratal boundary is a discontinuity, there is consensus that all the identified boundaries are stratal surfaces. Includes: 1. Unconformity bounded units (Salvador 1994), defined by bounding stratigraphic discontinuities ('significant unconformities'; unconformity is defined as surface of erosion in Salvador 1994).2. Sequence stratigraphic unit, an allostratigraphic unit that is used to interpret the depositional origin of sedimentary strata and assumes, though this is not always stated, an implicit connection to base level change. It does this by establishing how the sequence of strata accumulated in order in the sedimentary section over a subdividing framework of surfaces.
fr Unité géologique définie par des contours de surface. Cette unité n’est pas nécessairement stratifiée.
item class Concept
label
en Allostratigraphic Unit
fr Unité allostratigraphique
modified 7 Dec 2022 15:15:29.275
notation 14
register geol unit type
status status stable
submitter
account name h.bressan@brgm.fr
name Hélène Bressan

type register item
version info 5
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Definition

category geology
description
en Geologic unit defined by bounding surfaces. Not necessarily stratified. Donovon (2004, IUGS abstract Florence) makes good case for use of a noncommittal term for the bounding surface. While there may be no agreement that a given stratal boundary is a discontinuity, there is consensus that all the identified boundaries are stratal surfaces. Includes: 1. Unconformity bounded units (Salvador 1994), defined by bounding stratigraphic discontinuities ('significant unconformities'; unconformity is defined as surface of erosion in Salvador 1994).2. Sequence stratigraphic unit, an allostratigraphic unit that is used to interpret the depositional origin of sedimentary strata and assumes, though this is not always stated, an implicit connection to base level change. It does this by establishing how the sequence of strata accumulated in order in the sedimentary section over a subdividing framework of surfaces.
fr Unité géologique définie par des contours de surface. Cette unité n’est pas nécessairement stratifiée.
exact match allostratigraphic unit
in scheme Geologic Units types
label
en Allostratigraphic Unit
fr Unité allostratigraphique
nature Référent
notation 14
pref label
en Allostratigraphic Unit
fr Unité allostratigraphique
status Valid
top concept of Geologic Units types
type Concept

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