Lancaster Fells

© Craven & Pendle Geological Society

Low Bentham Wier

Tuning fork ripples

Marine Band (in the shade)

Low Bentham Wier
The Palaeontological Association Group Meeting in 1991 included a visit to Low Bentham.  This
offered an opportunity to see a unique early Namurian stratigraphy of shallow marine sandstones of early Kinderscoutian age (R1b3) very rarely preserved in the UK.

This section shows long bedding plane outcrops of shallow marine sandstones of early Kinderscoutian age, near the base of the Reticuloceras stubblefieldi Marine Band (R1b3). Tuning fork ripples are spectacularly displayed. Gutters with linguoid ripples interrupt some of the wave ripples. Fossils faunas include bioclasts of crinoid and brachiopod hash. Ichnofauna is abundant, with Diplocraterion especially in evidence. The facies is indicative of nearshore, shallow subtidal.

The axis of the river runs along the strike of the mudstone dominated phase of the marine band. During low water it is possible to collect brachiopods and mollusc dominated faunas on the opposite bank.

Low Bentham Wier was was STOP 10 on a busy itinerary which had included visits to the Holkerian and Asbian stratotypes and the parastratotype Mid - Carboniferous Boundary section on the Lancaster Fells. Bear in mind that the outcrop may well be covered in moss. No hammering please.