Scotland Chalk nomenclature (Scottish Chalk Province) - Inner Hebrides Group: Lochaline White Sandstone Formation: Difference between revisions

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=====Name=====
 
Name
 
 
 
The Loch Aline Glass Sand of Rawson et al. (1978) and the Lochaline Sandstone Member in Braley (1990). The formation as named above proposed by Mortimore et al. (2001).
The Loch Aline Glass Sand of Rawson et al. (1978) and the Lochaline Sandstone Member in Braley (1990). The formation as named above proposed by Mortimore et al. (2001).


 
=====''Type section''=====
 
'' ''
 
 
 
''Type section''
 
 
 
Lochaline Mine adit section [NM 6800 4535], Morvern.
Lochaline Mine adit section [NM 6800 4535], Morvern.


 
=====''Primary Reference Section''=====
 
 
 
 
 
''Primary Reference Section''
 
 
 
Loch Aline three sections given in Braley (1990) at waterfalls around the loch [NM 6935 4595, NM 6869 4665, NM 6935 4535], Beinn Iadain [NM 6917 5490 and NM 6965 5645] all in the Morvern district. At various sites in Mull e.g. Auchnacraig Cliff [NM 7440 2989] in Braley (1990) and Alt na Teangaigh [NM 453 328] in Mortimore et al. (2001).
Loch Aline three sections given in Braley (1990) at waterfalls around the loch [NM 6935 4595, NM 6869 4665, NM 6935 4535], Beinn Iadain [NM 6917 5490 and NM 6965 5645] all in the Morvern district. At various sites in Mull e.g. Auchnacraig Cliff [NM 7440 2989] in Braley (1990) and Alt na Teangaigh [NM 453 328] in Mortimore et al. (2001).


 
=====Formal subdivision=====
 
 
 
 
 
Formal subdivision
 
 
 
None
None


 
=====''Lithology ''=====
 
 
 
 
 
''Lithology ''
 
 
 
Very pure white to pale yellow brown well-sorted medium-grained quartz sandstone. Massive with laminated and shelly beds to base. Most comprehensively described by Humphries (1961) at its type-site.
Very pure white to pale yellow brown well-sorted medium-grained quartz sandstone. Massive with laminated and shelly beds to base. Most comprehensively described by Humphries (1961) at its type-site.


 
=====''Definition of upper boundary''=====
 
 
 
 
 
''Definition of upper boundary''
 
 
 
Unconformable beneath the Gribun Chalk Formation or Coire Riabhach Phosphatic Formation.
Unconformable beneath the Gribun Chalk Formation or Coire Riabhach Phosphatic Formation.


 
=====''Definition of lower boundary ''=====
 
 
 
 
 
''Definition of lower boundary ''
 
 
 
Conformable (?) on the Morvern Greensand Formation.
Conformable (?) on the Morvern Greensand Formation.


 
=====''Thickness''=====
 
 
 
 
 
''Thickness''
 
 
 
Up to 40 feet (12.2 m) on the West side of Loch Aline according to Humphries (1961).
Up to 40 feet (12.2 m) on the West side of Loch Aline according to Humphries (1961).


 
=====Distribution=====
 
 
 
 
 
Distribution
 
 
 
Known from the Morvern district and the Isle of Mull.
Known from the Morvern district and the Isle of Mull.


 
=====''Previous/equivalent names''=====
 
 
 
 
 
''Previous/equivalent names''
 
 
 
Loch Aline Glass Sand (Loch Aline) (map code of h5’) as on Lismore 44E, Eastern Mull 44W.
Loch Aline Glass Sand (Loch Aline) (map code of h5’) as on Lismore 44E, Eastern Mull 44W.


White Sandstone (map code of h5’) as on Iona 43.
White Sandstone (map code of h5’) as on Iona 43.


White Sandstone (≡Loch Aline Glass Sand) (map code of LAWS) as on Staffa 43N.
White Sandstone (≡Loch Aline Glass Sand) (map code of LAWS) as on Staffa 43N.


Loch Aline White Sandstone.
Loch Aline White Sandstone.


 
=====Parent=====
 
 
 
 
 
Parent
 
 
 
Inner Hebrides Group.
Inner Hebrides Group.


 
=====''Age and biostratigraphy ''=====
 
 
 
 
 
''Age and biostratigraphy ''
 
 
 
Upper Cretaceous, Cenomanian; Turonian to Santonian in Mortimore et al. (2001).
Upper Cretaceous, Cenomanian; Turonian to Santonian in Mortimore et al. (2001).


 
=====''References''=====
 
 
 
 
 
''References''
 
 
 
Braley (1990);  Lowden, Braley, Hurst and Lewis (1992); Mortimore, Wood and Gallois (2001). (In this volume a number of the correlations in the earlier works are adjusted and the dating of the sequence refined. The term Lochaline White Sandstone Formation appears first in this volume as one of the adjustments to the terminology and correlation of the sequence of Braley, 1990).
Braley (1990);  Lowden, Braley, Hurst and Lewis (1992); Mortimore, Wood and Gallois (2001). (In this volume a number of the correlations in the earlier works are adjusted and the dating of the sequence refined. The term Lochaline White Sandstone Formation appears first in this volume as one of the adjustments to the terminology and correlation of the sequence of Braley, 1990).


[[category:Scotland_Chalk_nomenclature_(Scottish_Chalk_Province)_-_Inner_Hebrides_Group | 02]]
[[category:Scotland_Chalk_nomenclature_(Scottish_Chalk_Province)_-_Inner_Hebrides_Group | 02]]

Latest revision as of 13:05, 11 June 2014

Name

The Loch Aline Glass Sand of Rawson et al. (1978) and the Lochaline Sandstone Member in Braley (1990). The formation as named above proposed by Mortimore et al. (2001).

Type section

Lochaline Mine adit section [NM 6800 4535], Morvern.

Primary Reference Section

Loch Aline three sections given in Braley (1990) at waterfalls around the loch [NM 6935 4595, NM 6869 4665, NM 6935 4535], Beinn Iadain [NM 6917 5490 and NM 6965 5645] all in the Morvern district. At various sites in Mull e.g. Auchnacraig Cliff [NM 7440 2989] in Braley (1990) and Alt na Teangaigh [NM 453 328] in Mortimore et al. (2001).

Formal subdivision

None

Lithology

Very pure white to pale yellow brown well-sorted medium-grained quartz sandstone. Massive with laminated and shelly beds to base. Most comprehensively described by Humphries (1961) at its type-site.

Definition of upper boundary

Unconformable beneath the Gribun Chalk Formation or Coire Riabhach Phosphatic Formation.

Definition of lower boundary

Conformable (?) on the Morvern Greensand Formation.

Thickness

Up to 40 feet (12.2 m) on the West side of Loch Aline according to Humphries (1961).

Distribution

Known from the Morvern district and the Isle of Mull.

Previous/equivalent names

Loch Aline Glass Sand (Loch Aline) (map code of h5’) as on Lismore 44E, Eastern Mull 44W.

White Sandstone (map code of h5’) as on Iona 43.

White Sandstone (≡Loch Aline Glass Sand) (map code of LAWS) as on Staffa 43N.

Loch Aline White Sandstone.

Parent

Inner Hebrides Group.

Age and biostratigraphy

Upper Cretaceous, Cenomanian; Turonian to Santonian in Mortimore et al. (2001).

References

Braley (1990); Lowden, Braley, Hurst and Lewis (1992); Mortimore, Wood and Gallois (2001). (In this volume a number of the correlations in the earlier works are adjusted and the dating of the sequence refined. The term Lochaline White Sandstone Formation appears first in this volume as one of the adjustments to the terminology and correlation of the sequence of Braley, 1990).

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