1-14 OF 14 RESULTS FOR

Portscatho Formation

Results shown limited to content with bounding coordinates.
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Journal Article
Published: 01 August 1987
Journal of the Geological Society (1987) 144 (4): 531–542.
...P. A. FLOYD; B. E. LEVERIDGE Abstract The Portscatho Formation, within the allochthonous unit of the Middle and Upper Devonian Gramscatho Group, is a thick sequence of deep-water sandstones and interbedded slates deposited by southerly-derived turbidity currents into the Gramscatho basin of south...
Journal Article
Published: 01 September 1989
Journal of the Geological Society (1989) 146 (5): 739–742.
... 1984; Barnes & Andrews 1986; Holder & Leveridge 1986). Palynology. A suite of 14 samples was collected from the parautochthonous Mylor Slate Formation and allochthonous Portscatho Formation (Holder & Leveridge 1986), on the west coast of the Lizard Peninsula (Fig. 1). Palynomorphs were...
Journal Article
Published: 01 January 1986
Journal of the Geological Society (1986) 143 (1): 125–134.
... Brzccia Formation (Fig. 2) with a present thickness of about 6.7 km. The Portscatho, Pendower and Carne Formations constitute the Group and correspond approximately with the Lower, Middle and Upper Gramscatho Beds described by Hendriks (1937). This stratigraphic terminology is defined in detail...
Journal Article
Published: 01 September 1994
Journal of the Geological Society (1994) 151 (5): 795–802.
... values of -10.2 to -11.5 and -9.2 to -9.6 respectively (calculated at T = 290 Ma). Data from southwest Cornwall are more variable. Samples from the basal suite of the Portscatho Formation in Megavissey Bay have very negative &Nd of -11.2 and a similar value of ISOTOPES FROM THE CORNUBIAN BATHOLITH 797...
Image
Occurrences of  A)  Early Devonian coaly shales and  B)  Middle–Late Devoni...
Published: 01 December 2013
, Aidarly deposits and Ermentau coals, Kazakhstan ( Volkova 1994 ); 12: Middle–late Famennian, Hampshire Formation, West Virginia, USA ( Gillespie et al. 1981 ; Scheckler 1986 ); 13: Frasnian, Portscatho Formation, Cornwall, England ( Cook et al. 1972 ); 14: Middle Devonian, Haikou Formation, Yunnan
Journal Article
Published: 01 August 1991
Journal of the Geological Society (1991) 148 (4): 731–736.
...). The Portscatho Formation, exposed in the south of the area, is dominated by sandstone-shale sequences believed to be of Middle-Upper Devonian age (Holder & Leveridge 1986; Wilkinson & Knight 1989). The Mylor Slate Formation, exposed in the north of the area, comprises, dark grey or grey-green mudrocks with thin...
Journal Article
Published: 26 June 2015
Journal of the Geological Society (2015) 172 (5): 566–575.
... ). Both are hosted by the Upper Devonian Portscatho Formation of the Gramscatho Basin ( Table 1 ; Leveridge & Hartley 2006 ; Leveridge & Shail 2011 ) and are weathered to a rusty red colour; they are likely to represent exposures of the same dyke, with c . 800 m along-strike separation. Both...
FIGURES | View All (4)
Series: Geological Society, London, Special Publications
Published: 01 January 2014
DOI: 10.1144/SP391.6
EISBN: 9781862396678
... the St Austell Granite along an adjacent strike-slip fault known as the Great Cross-course. Poltesco Quarry (SW 831/445) is situated on the east side of the Truro river, just below the city. The quarry exploits Portscatho Formation silty mudstones, which were used extensively in pre-twentieth century...
FIGURES | View All (18)
Journal Article
Published: 01 December 2013
Journal of Sedimentary Research (2013) 83 (12): 1202–1215.
..., Aidarly deposits and Ermentau coals, Kazakhstan ( Volkova 1994 ); 12: Middle–late Famennian, Hampshire Formation, West Virginia, USA ( Gillespie et al. 1981 ; Scheckler 1986 ); 13: Frasnian, Portscatho Formation, Cornwall, England ( Cook et al. 1972 ); 14: Middle Devonian, Haikou Formation, Yunnan...
FIGURES | View All (10)
Series: Geological Society, London, Geology of Series
Published: 01 January 2006
DOI: 10.1144/GOEWP.10
EISBN: 9781862393882
..., they extend into the deep-water Portscatho Formation sequence (Falmouth Series: Hill & MacAlister 1906 ) of the Gramscatho Basin. Gramscatho Basin Recognition that the association of peridotite, gabbro and mafic sheeted-dykes within the Lizard Complex in south Cornwall represented an obducted...
FIGURES | View All (21)
Journal Article
Published: 01 June 1997
Journal of the Geological Society (1997) 154 (3): 403–417.
... by Floyd & Leveridge (1987), who provided petrochemical and frame- work mode evidence for mature magmatic-arc detritus in the Devonian Portscatho Formation of S Cornwall. A Devonian age for arc development was proposed, but Sm-Nd isotopic data presented in Floyd et al. (1991) demonstrated that much...
Series: Geological Society, London, Special Publications
Published: 22 April 2024
DOI: 10.1144/SP542-2022-354
EISBN: 9781786206398
... and the MOR-type metabasalts in the German allochthons, the Portscatho Formation of the Carrick Nappe and the Gießen-S-Harz Greywacke (Upper Allochthon, see ‘RH upper plate in the allochthons of Germany’ section; Floyd et al. 1991 ) and the Upper Devonian Roseland Breccia Formation of SW England...
FIGURES | View All (6)
Series: Geological Society, London, Special Publications
Published: 14 October 2021
DOI: 10.1144/SP492-2019-42
EISBN: 9781786209870
... SX04879 86451 23/1 Meta-mudstone Polzeath Slate Formation Devonian (Frasnian–Famennian) Managed grassland SW96717 77740 24/1 Meta-mudstone Porthtowan Formation Devonian (Eifelian–Frasnian) Grassland margin to cultivated field SW78531 47936 25/1 Meta-sandstone/mudstone Portscatho...
FIGURES | View All (6)
Series: Geological Society, London, Special Publications
Published: 15 March 2021
DOI: 10.1144/SP506-2019-194
EISBN: 9781786209931
... Hendriks’ future field area. The surveyor, James Bastian Hill (1861–1927), placed the killas of the Falmouth area into four series called, in ascending order: Mylor, Falmouth, Portscatho and Veryan ( Hill and MacAlister 1906 ). The latter contained the Ordovician quartzites and the other series were...
FIGURES | View All (8)