The Highland Border controversy: a discussion of "New evidence that the Lower Cambrian Leny Limestone at Callander, Perthshire, belongs to the Dalradian Supergroup, and a reassessment of the 'exotic' status of the Highland Border Complex." (reply to P.W.G. Tanner, Geological Magazine, vol. 132, pp. 473-483, 1995)(includes response)
Article Abstract:
The idea that the structural similarity between Scotland's Highland Border Complex and the Dalradian block implies continuity in the structures as well as continuity of succession is refuted. Such notion is based on the structural similarity of rocks in some parts of the complex to the Dalradian, which led to the conclusion that they are part of the Dalradian sequence. The structural similarity between Dalradian and Highland Border Complex is believed to be either a coincidence or a result of late stage deformation.
Publication Name: Geological Magazine
Subject: Earth sciences
ISSN: 0016-7568
Year: 1997
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Discussion on a revision of Ordovician Series and Stage divisions from the historical type area
Article Abstract:
The proposed revision of the Ordovician chronostratigraphical standard use historic priority and usage as its main criteria. The nomenclature has three divisions: Caradoc, Llandeilo, and Arenig. Caradoc is further subdivided into four divisions: Ashgillian, Streffordian, Cheneyan, and Burrellian. Llandelio has two subdivisions: Dyneforian and Llanvirnian, while Arenig consist of the Fennian group. The biostratigraphical correlation of the proposed divisions and subdivisions is included.
Publication Name: Geological Magazine
Subject: Earth sciences
ISSN: 0016-7568
Year: 1996
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A revision of Ordovician series and stages from the historical type area
Article Abstract:
A modified version of the Ordovician Correlation Chart of rocks in the British Isles incorporates the Tremadoc series and includes a wider strata. Tremadoc, Arenig, Llanvirn, Caradoc and Ashgill are the main series that are subdivided to stages. There are four new stages in the Caradoc series, while the other subdivisions form substages. This revised version of the Ordovician series finds a wider range of application and serves as a specification for future modifications.
Publication Name: Geological Magazine
Subject: Earth sciences
ISSN: 0016-7568
Year: 1995
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