| Premise | Member defined by van Adrichem Boogaert & Kouwe (1993). | ||
| Derivatio nominis | Named after the offshore Upper Scruff Bank near well F03-03. | ||
| Type section | Location map | See figure (pdf) | |
| Well | F15-02 (pdf) | ||
| Location | N 54°14’18.5 E 04°50’44.9 |
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| Depth | 3246 to 3276 m | ||
| Length | 30 m along hole | ||
| Definition | Moderately to well-sorted, greenish-grey non-argilla-ceous, calcite-cemented, glauconitic sandstone, with fine to medium sand (up to gravel) grain sizes. The member is usually bioturbated locally shell debris is found. | ||
| Upper Boundary | The upper boundary, with the Argillaceous Member or Kim-meridge Clay Formation, is marked by a gradual upward increase in GR-readings (bell shape). | ||
| Lower Boundary | The lower boundary, with the Oyster Ground Claystone Member (Friese Front Formation), is marked by a sharp downward increase in GR readings, although a gentle funnel shape can be observed in the uppermost parts of the Oyster Ground Claystone Member in some wells. | ||
| Distribution | Southern Dutch Central Graben, southern F-quadrant. In basin-margin settings (northern L-quadrant, eastern Terschelling Basin (see pdf) (F15-A-01) the Basal Sandstone Member was not deposited or has been eroded. The member is mutually exclusive with the Terschelling Sandstone of the Friese Front Formation. It is a lateral equivalent of the Terschelling Sandstone Member (Friese Front Formation), which constitutes a basin-fringe equivalent in the northern L-quadrant. | ||
| Age | An earliest Portlandian(-latest Kimmeridgian) age is in-ferred from Ctenidodinium culmulum, C. panneum, Glos-sodinium dimorphum, Gochteodinia mutabilis and Seno-niasphaera jurassica. Sporomorphs are Cicatricosispo-rites spp. and Parvisaccites radiatus (Herngreen and Wong (1989) ). | ||
| Depositional Setting | These sands were deposited in a transgressive shoreface setting. In the northern L-quadrant they grade into coast-al-barrier and tidal-inlet deposits of the Terschelling Sandstone Member The lithofacies suggests reworking- and winnowing-controlled sheet-sand deposition. Glauconite and fossils attest to the marine, reworked nature of the deposit. | ||
| Sequence Stratigraphy | The Basal Sandstone Scruff Member reflects the Transgres-sive systems tract of Haq (1988) ’s sequence LZB 1.2. | ||
| References | See References Upper Jurassic/ Lower Cretaceous | ||
Van Adrichem Boogaert, H.A. & Kouwe, W.F.P., 1993-1997. [Stratigraphic unit]. In: Stratigraphic Nomenclature of the Netherlands. Retrieved [Datum] from [url]. |
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