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  • == Mercia Mudstone Group == ...il|Fossils 5-11 Mid- to Late Triassic (Anisian-Carnian) miospores from the Mercia Mudstone Group in the Larne No. 2 borehole: 5 Guttulapollenites hannonicus, 6 Verrucosispo
    5 KB (786 words) - 12:46, 25 September 2017
  • [[Image:P210568.jpg|thumb|right|300px|Mercia Mudstone Group and Penarth Group successions (late Triassic) — Aust Cliff, Avo [[Image:P211340.jpg|thumb|right|300px|Mercia Mudstone Group and Penarth Group successions (late Triassic) — Blue Anchor, no
    12 KB (1,906 words) - 13:28, 30 January 2018

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  • ...in this district. The upper boundary of this unit is gradational into the Mercia Mudstone Group above. ===== Mercia Mudstone Group (MMG) =====
    1 KB (203 words) - 15:20, 28 July 2015
  • ...d into the Sherwood Sandstone Group (formerly the ‘Bunter Sandstone’), the Mercia Mudstone Group (formerly the ‘Keuper Marl’) and the Penarth Group (formerly the ‘Rha :[[Mercia Mudstone Group, Triassic, Northern Ireland|Mercia Mudstone Group]]
    2 KB (252 words) - 13:07, 25 September 2017
  • ...bnail|The Waterloo foreshore near Larne showing the Collin Glen Formation (Mercia Mudstone Group) in foreground overlain by the Penarth Group. (P948009)]] ...947940)]]. The Penarth Group at Larne rests disconformably on rocks of the Mercia Mudstone Group [[Media:P948009.jpg| (P948009)]] and is conformably succeeded by the Waterl
    4 KB (535 words) - 12:53, 25 September 2017
  • == Depositional environment (Mercia Mudstone Group, Penarth Group, Waterloo Mudstone Formation) == [[File:P947851.jpg|thumbnail|Depositional model for the Mercia Mudstone Group (17). (P947851)]]
    5 KB (754 words) - 11:49, 25 September 2017
  • ...abkha flats. The facies is markedly diachronous, persisting throughout the Mercia Mudstone Group wherever it onlaps the Palaeozoic rocks, but crops out only around Wick in The red mudstone of the undivided Mercia Mudstone Group grades rapidly up into the Blue Anchor Formation (BAn), an up to 5 m-thic
    5 KB (747 words) - 13:20, 2 December 2015
  • == Mercia Mudstone Group == ...il|Fossils 5-11 Mid- to Late Triassic (Anisian-Carnian) miospores from the Mercia Mudstone Group in the Larne No. 2 borehole: 5 Guttulapollenites hannonicus, 6 Verrucosispo
    5 KB (786 words) - 12:46, 25 September 2017
  • ...ch is strongly downfaulted against the Palaeozoic rocks. South of this the Mercia Mudstone Group margin is unfaulted and the limits of the main sandstone sequence beneath a
    4 KB (617 words) - 13:31, 30 January 2018
  • ...ned extensively causing subsidence in places. The maximum thickness of the Mercia Mudstone Group, about 1340m, was proved in a borehole at Prees in the Cheshire Basin. ...f Wales. The Blue Anchor Formation ('''Plate P579282''') at the top of the Mercia Mudstone Group marks the beginning of this process. It consists of greenish grey dolomitic
    7 KB (1,070 words) - 12:23, 19 June 2014
  • The younger Mercia Mudstone Group comprises massive red-brown dolomitic mudstones with gypsum either in veins
    1 KB (189 words) - 08:35, 18 February 2016
  • ...ent drilling has indicated the presence of an extensive saltfield in the [[Mercia Mudstone Group, Permo-Triassic, Bristol and Gloucester region|Central Somerset Basin]]. Gy
    4 KB (531 words) - 13:22, 30 January 2018
  • ...e Formation but it is inferred to be present everywhere at the base of the Mercia Mudstone Group in this region (Warrington et al., 1980<ref name="Warrington 1980"></ref>). ...andstone Formation had been mapped in two fault blocks but overlain by the Mercia Mudstone Group with no Tarporley Siltstone Formation delineated. This necessitated fieldwo
    3 KB (516 words) - 15:48, 18 October 2018
  • [[Image:P210568.jpg|thumb|right|300px|Mercia Mudstone Group and Penarth Group successions (late Triassic)&nbsp;—&nbsp;Aust Cliff, Avo [[Image:P211340.jpg|thumb|right|300px|Mercia Mudstone Group and Penarth Group successions (late Triassic)&nbsp;—&nbsp;Blue Anchor, no
    12 KB (1,906 words) - 13:28, 30 January 2018
  • | '''MERCIA MUDSTONE GROUP&nbsp;–&nbsp;MUDSTONE, SILTSTONE AND SANDSTONE''' | style="background-color: #b1a0c7;" | '''Tarporley Siltstone Formation and Mercia Mudstone Group'''
    33 KB (3,749 words) - 09:09, 4 May 2017
  • ...ords a major, late Triassic (Rhaetian) marine transgression. The Triassic, Mercia Mudstone Group sequence is also preserved farther south in Cumbria, on Walney Island, as a ...(up to about 25 m) and only rarely preserved. It rests conformably on the Mercia Mudstone Group, and comprises dark grey, fissile marine mudstone with abundant silty lamin
    12 KB (1,844 words) - 14:21, 29 January 2015
  • Minor thin siltstone beds or ‘skerries’ within the Mercia Mudstone Group (MMG) formations are not modelled, nor are the mudstone units in the Arden ...erentiate between the Bromsgrove Sandstone (BMS) and the formations of the Mercia Mudstone Group with a significant level of confidence. As such, more reliable information
    7 KB (1,117 words) - 15:48, 18 October 2018
  • ...inor amounts of dolostone, dolomitic mudstone and anhydrite. Strata of the Mercia Mudstone Group are not recognised in onshore west Cumbria, but are preserved beneath Quate ...al decrease in marine influence by these times. The youngest strata of the Mercia Mudstone Group in the East Irish Sea Basin and around the Isle of Man are grey-green dolom
    17 KB (2,606 words) - 12:33, 6 May 2016
  • ...w, respectively. Inferred thicknesses of the constituent formations of the Mercia Mudstone Group, borehole data and field observations enabled the separation of the otherwi
    13 KB (1,679 words) - 15:48, 18 October 2018
  • ..., mudstones and calcareous mudstones (marl) that has been equated with the Mercia Mudstone Group (Lovell, 1991). The presence of carbonate concretions, pseudomorphs after h
    9 KB (1,353 words) - 11:29, 1 February 2018
  • ...largely in fractures and voids, whilst the conglomerate and breccia of the Mercia Mudstone Group Marginal Facies form the only significant aquifer of Triassic age. Younger ...Fuller’s Earth Formation, Charmouth Mudstone Formation, Penarth Group and Mercia Mudstone Group are regarded as non-aquifers. Whilst water flow through such rocks is small
    9 KB (1,344 words) - 13:26, 2 December 2015
  • ...ontaining hematite (known as red ochre) commonly occurs at the base of the Mercia Mudstone Group. The hematite is believed to be derived from the oxidation of pyrite in the :: [[Mercia Mudstone Group, Permo-Triassic, Bristol and Gloucester region|Mercia Mudstone Group]]
    11 KB (1,778 words) - 13:31, 30 January 2018

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