Sedimentological studies of the Cretaceous Lochaline Sandstone, NW Scotland

Lowden, Ben D.; Braley, Sharon M.; Hurst, Andrew; Lewis, J.F.

doi:10.1144/gsl.sp.1992.062.01.14

Cited by 4 publications

(2 citation statements)

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“…The Upper Triassic sandstones are conformably overlain by Lower Jurassic sandstones and shales, in turn unconformably overlain by the c. 20 m thick Cenomanian (possibly Turonian) marginal marine Loch Aline White Sandstone Formation, indicating the presence of a Cenomanian coastline (Lowden et al 1992). The absence of Middle Jurassic to Lower Cretaceous section indicates a period of erosion or non-deposition during this interval.…”

Section: Integration Of Afta Data With Stratigraphic Constraints On Tmentioning

confidence: 97%

Multiple post-Caledonian exhumation episodes across NW Scotland revealed by apatite fission-track analysis

Holford

Green²,

Hillis

et al. 2010

JGS

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14The post Caledonian exhumation history of northwest Scotland is a controversial issue, with 15 some studies advocating largely continual emergence while others suggest dominantly early Abstract 36The origin and development of the high topography bordering the Atlantic margin of NW 37 Europe has long been the subject of debate (Geike, 1901; George, 1966; Doré et al., 2002). 38 The mountains of Scotland and western Scandinavia are characterized by rugged topography 39 and elevations that exceed 1.3 km and 2.4 km respectively and largely comprise rocks that 40 were formed and/or deformed during the Caledonian Orogeny. Numerous lines of evidence 41 indicate that the present-day topography of both regions was initiated by tectonic uplift that 42 began during the Cenozoic or late Mesozoic and which also affected peripheral sedimentary 43 basins (Doré et al., 2002). These include; the transition from deposition of shallow-marine 44 carbonates in the late Cretaceous to rejuvenated clastic sedimentation in the early Palaeogene 45 (Doré et al., 2002)); the easterly tilt of Britain (Brodie & White, 1994) Cretaceous rocks are less widely distributed (Fig. 1), but this is considered to be due 137 Cenozoic uplift and erosion rather than non-deposition (Hallam, 1983 This igneous activity has been attributed to the proto-Iceland mantle plume, and petrological 150 data suggest that a significant proportion (up to 70%) of the melt generated around the British Post-Caledonian exhumation of northwest Scotland 8We present AFTA data from 78 samples collected from onshore and offshore northwest 177 Scotland (Fig. 1 The majority of measured fission track ages are younger than the respective stratigraphic ages 187 (Table 1). Overall there is a consistent trend between fission track age and mean track length, totally anneal all tracks (typically >110°C), followed by a subsequent peak around 90-100°C 245 which leads to shortening of tracks formed after the initial cooling to a mean length of ~10 246 μm. Finally, cooling to a low temperature is followed by reheating to ~70°C, sufficient to 247 reduce track lengths formed after the second episode to ~12-13 μm. Post-Caledonian exhumation of northwest Scotland 11 West Orkney Basin 252Of six Permian-Lower Jurassic samples from offshore shallow boreholes in the WOB, most 253 require two discrete episodes of heating and cooling (Table 2) Post-Caledonian exhumation of northwest Scotland 12The variation of palaeotemperature with depth for the two separate episodes (Fig. 4b (Table 2). An onset of cooling beginning between 225 319 and 190 Ma satisfies all samples that show evidence for this episode (Fig. 3). on this basis for sample GC369-6 predicts total annealing, whereas this sample contains 353 tracks and gives a finite (though very young) fission track age (Fig. 5a) superimposed on a "background" linear profile (Fig. 5b). The rapid fluctuations clearly 366 reflect contact heating around the igneous intrusions. AFTA data in GC369-2 is also 367 interpr...

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Section: Integration Of Afta Data With Stratigraphic Constraints On Tmentioning

confidence: 97%

Multiple post-Caledonian exhumation episodes across NW Scotland revealed by apatite fission-track analysis

Holford

Green²,

Hillis

et al. 2010

JGS

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“…To test our model, we used the measured zeta potentials of Fontainebleau (F2D, F3Q, F4Q) and Lochaline (L3Q, L4Q) samples in contact with a NaCl aqueous solution of increasing salinity obtained by the streaming potential method and reported in Walker and Glover [15]. These two sample types were selected as they are known to consist of more than 99% quartz (by weight) [13,54]. Unlike Fontainebleau and Lochaline samples, zeta potentials of Berea and Boise sandstones reported by Walker and Glover [15] that contained up to 6% feldspar, 2% dolomite, and 8% clays for Berea rocks [55] and up to 13% clays for Boise rocks [56], were excluded from the simulation.…”

Section: Considerations Of Impact Of Pore Space Topology and Grain Ro...mentioning

confidence: 99%

The zeta potential of quartz. Surface complexation modelling to elucidate high salinity measurements

Leroy

Maineult

et al. 2022

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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The myth of the Highland Cretaceous revealed by the art of palaeogeographic mapping

Macdonald

2023

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Since the term was coined in 1873, paleogeography has provided a powerful map-based tool for synthesising, visualising, and testing diverse regional data and hypotheses, but there are problems in deducing the palaeogeography of areas with few data points. As an example, the Scottish Highlands are better mapped and more studied than almost any other ancient orogen, yet questions remain on the persistence of topography since the Caledonian orogeny and the possibility of Cretaceous marine inundation. This paper reviews the data available on Scottish Cretaceous outcrops using published geological maps and memoirs to extract data: outcrop length, stratigraphic thickness and component units, elevation range of the outcrop, and subcrop formations. All Cretaceous rocks in western Scotland were deposited in shallow marine and shoreline environments; deposits thin northwards and appear to be close to a feather edge. Elevation data are used to construct a Cretaceous surface which intersects present-day topography at low to intermediate altitudes. It is concluded that the Scottish Highlands were largely emergent during the Late Cretaceous, confirming previous palaeogeographic studies.

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Sedimentological studies of the Cretaceous Lochaline Sandstone, NW Scotland

Cited by 4 publications

References 6 publications

Multiple post-Caledonian exhumation episodes across NW Scotland revealed by apatite fission-track analysis

Multiple post-Caledonian exhumation episodes across NW Scotland revealed by apatite fission-track analysis

The zeta potential of quartz. Surface complexation modelling to elucidate high salinity measurements

The myth of the Highland Cretaceous revealed by the art of palaeogeographic mapping

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