Scotland Chalk nomenclature (Scottish Chalk Province) - Inner Hebrides Group: Morven Greensand Formation: Difference between revisions

From MediaWiki
Jump to navigation Jump to search
Dbk (talk | contribs)
Image-reviewer, administrator, autoreview, Bots, Bureaucrats, commentadmin, editor, Interface administrators, reviewer, smwadministrator, smwcurator, Administrators, Upload Wizard campaign editors, widgeteditor
18,248 edits
Created page with "=====Name===== In older literature known as the Cenomanian Greensand, Greensand and Cenomanian Greensand Member. Designated the Morvern Greensand in Rawson et al. (1978) and g..."
 
Dbk (talk | contribs)
Image-reviewer, administrator, autoreview, Bots, Bureaucrats, commentadmin, editor, Interface administrators, reviewer, smwadministrator, smwcurator, Administrators, Upload Wizard campaign editors, widgeteditor
18,248 edits
m Protected "Scotland Chalk nomenclature (Scottish Chalk Province) - Inner Hebrides Group: Morven Greensand Formation" ([Edit=Allow only administrators] (indefinite) [Move=Allow only administrators] (indefinite)) [cascading]
 
(One intermediate revision by the same user not shown)
Line 2: Line 2:
In older literature known as the Cenomanian Greensand, Greensand and Cenomanian Greensand Member. Designated the Morvern Greensand in Rawson et al. (1978) and given formation status in Braley (1990).
In older literature known as the Cenomanian Greensand, Greensand and Cenomanian Greensand Member. Designated the Morvern Greensand in Rawson et al. (1978) and given formation status in Braley (1990).


 
=====''Type section''=====
 
 
 
 
 
''Type section''
 
 
 
In Braley (1990) two sections given on Beinn Iadain as [NM 6917 5490 and NM 6965 5645] the former presumed to be the section described in Judd (1878) and Lee and Bailey (1925). Mortimore et al. (2001) give their locality as Beinn Iadain, Morvern [NM 670 541 to NM 689 528] and also a site called Beinn na H-Uamha at [NM 68].
In Braley (1990) two sections given on Beinn Iadain as [NM 6917 5490 and NM 6965 5645] the former presumed to be the section described in Judd (1878) and Lee and Bailey (1925). Mortimore et al. (2001) give their locality as Beinn Iadain, Morvern [NM 670 541 to NM 689 528] and also a site called Beinn na H-Uamha at [NM 68].


 
=====''Primary Reference Section''=====
 
 
 
 
 
''Primary Reference Section''
 
 
 
Loch Aline Borehole No. 10 [NM 6890 4695] and Auchnacraig Cliff [NM 7440 2989] in Braley (1990) and Alt na Teangaigh [NM 453 328], Isle of Mull, Mortimore et al. (2001).
Loch Aline Borehole No. 10 [NM 6890 4695] and Auchnacraig Cliff [NM 7440 2989] in Braley (1990) and Alt na Teangaigh [NM 453 328], Isle of Mull, Mortimore et al. (2001).


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


 
=====Lithology=====
 
 
 
 
 
Lithology
 
 
 
Glauconitic calcareous sandstone, white to pale greenish. Some gritty beds and calcareous inclusions up to cobble size. Conspicuously shelly (mainly oysters) in parts.
Glauconitic calcareous sandstone, white to pale greenish. Some gritty beds and calcareous inclusions up to cobble size. Conspicuously shelly (mainly oysters) in parts.


 
=====Definition of upper boundary=====
 
 
 
 
 
Definition of upper boundary
 
 
 
Conformable with the Lochaline White Sandstone Formation. However Braley (1990) and Lowden et al. (1992) regarded the Lochaline White Sandstone Formation as a member within this formation and considered the upper boundary as unconformable with the Gribun Chalk Formation.
Conformable with the Lochaline White Sandstone Formation. However Braley (1990) and Lowden et al. (1992) regarded the Lochaline White Sandstone Formation as a member within this formation and considered the upper boundary as unconformable with the Gribun Chalk Formation.


 
=====''Definition of lower boundary ''=====
 
 
 
 
 
''Definition of lower boundary ''
 
 
 
Unconformable on various Jurassic and Triassic strata.
Unconformable on various Jurassic and Triassic strata.


 
=====''Thickness''=====
 
 
 
 
 
''Thickness''
 
 
 
0.3 to 13.4 m in Rawson et al. (1978).
0.3 to 13.4 m in Rawson et al. (1978).


 
=====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''
 
 
 
Greensand in the literature.
Greensand in the literature.


Cenomanian Greensand (map code of h or h5) as on Ardnamurchan 52W, Strontian 52E, Iona 43, Mull 44.
Cenomanian Greensand (map code of h or h5) as on Ardnamurchan 52W, Strontian 52E, Iona 43, Mull 44.


Glauconitic Sandstone'''  '''(≡ Greensand) (map code of GSM or MorG) as on Staffa 43N, Ross of Mull 43S.
Glauconitic Sandstone'''  '''(≡ Greensand) (map code of GSM or MorG) as on Staffa 43N, Ross of Mull 43S.


Greensand of Morvern obsolete Dic_Strat entry  (code of GSM).
Greensand of Morvern obsolete Dic_Strat entry  (code of GSM).


Morvern Greensand (h5) as on Eastern Mull 44W, Lismore 44E and in general informal use in the literature.
Morvern Greensand (h5) as on Eastern Mull 44W, Lismore 44E and in general informal use in the literature.


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


=====''Age and biostratigraphy''=====
Upper Cretaceous, Cenomanian


 
=====''References''=====
 
 
 
 
''Age and biostratigraphy''
 
 
 
Upper Cretaceous, Cenomanian'' ''
 
 
 
 
 
 
 
''References''
 
 
 
Rawson et al. (1978); Lee and Pringle (1932); Braley (1990);  Lowden, Braley, Hurst and Lewis (1992); Mortimore, Wood and Gallois (2001).''''''
Rawson et al. (1978); Lee and Pringle (1932); Braley (1990);  Lowden, Braley, Hurst and Lewis (1992); Mortimore, Wood and Gallois (2001).''''''


[[category:Scotland_Chalk_nomenclature_(Scottish_Chalk_Province)_-_Inner_Hebrides_Group | 01]]
[[category:Scotland_Chalk_nomenclature_(Scottish_Chalk_Province)_-_Inner_Hebrides_Group | 01]]

Latest revision as of 13:05, 11 June 2014

Name

In older literature known as the Cenomanian Greensand, Greensand and Cenomanian Greensand Member. Designated the Morvern Greensand in Rawson et al. (1978) and given formation status in Braley (1990).

Type section

In Braley (1990) two sections given on Beinn Iadain as [NM 6917 5490 and NM 6965 5645] the former presumed to be the section described in Judd (1878) and Lee and Bailey (1925). Mortimore et al. (2001) give their locality as Beinn Iadain, Morvern [NM 670 541 to NM 689 528] and also a site called Beinn na H-Uamha at [NM 68].

Primary Reference Section

Loch Aline Borehole No. 10 [NM 6890 4695] and Auchnacraig Cliff [NM 7440 2989] in Braley (1990) and Alt na Teangaigh [NM 453 328], Isle of Mull, Mortimore et al. (2001).

Formal subdivision

None

Lithology

Glauconitic calcareous sandstone, white to pale greenish. Some gritty beds and calcareous inclusions up to cobble size. Conspicuously shelly (mainly oysters) in parts.

Definition of upper boundary

Conformable with the Lochaline White Sandstone Formation. However Braley (1990) and Lowden et al. (1992) regarded the Lochaline White Sandstone Formation as a member within this formation and considered the upper boundary as unconformable with the Gribun Chalk Formation.

Definition of lower boundary

Unconformable on various Jurassic and Triassic strata.

Thickness

0.3 to 13.4 m in Rawson et al. (1978).

Distribution

Known from the Morvern district and the Isle of Mull.

Previous/equivalent names

Greensand in the literature.

Cenomanian Greensand (map code of h or h5) as on Ardnamurchan 52W, Strontian 52E, Iona 43, Mull 44.

Glauconitic Sandstone (≡ Greensand) (map code of GSM or MorG) as on Staffa 43N, Ross of Mull 43S.

Greensand of Morvern obsolete Dic_Strat entry (code of GSM).

Morvern Greensand (h5) as on Eastern Mull 44W, Lismore 44E and in general informal use in the literature.

Parent

Inner Hebrides Group.

Age and biostratigraphy

Upper Cretaceous, Cenomanian

References

Rawson et al. (1978); Lee and Pringle (1932); Braley (1990); Lowden, Braley, Hurst and Lewis (1992); Mortimore, Wood and Gallois (2001).'

Retrieved from "http://earthwise.bgs.ac.uk/index.php?title=Scotland_Chalk_nomenclature_(Scottish_Chalk_Province)_-_Inner_Hebrides_Group:_Morven_Greensand_Formation&oldid=5051"