The BGS Lexicon of Named Rock Units — Result Details

Ardnandave Sandstone Formation

Computer Code: ARES Preferred Map Code: ARSF
Status Code: Full
Age range: Ediacaran Period (AD) — Ediacaran Period (AD)
Lithological Description: Metasandstone; arenite, locally quartzose and microconglomerate, with minor semipelite abundant locally.
Definition of Lower Boundary: Rapid transition from interbedded semipelite and arenite (Ben Lui Schist Formation) upwards into quartzose arenites. Locally metalimestone (Loch Tay Limestone Formation) is present. Metadolerite sills also intruded along contact zone in type area.
Definition of Upper Boundary: Incoming of chloritic, more matrix-rich greenish to green and commonly rusty weathering arenites and wackes (at the base of the Loch Katrine Volcaniclastic Formation).
Thickness: c.1000m maximum (estimated)
Geographical Limits: Within sheet 38E as currently defined, fringing the Ben Ledi - Ben Vane - Ardnandave Hill massif above Loch Lubnaig and limited to the west side of the Loch Tay Fault.
Parent Unit: Southern Highland Group (SOHI)
Previous Name(s): Ben Ledi Grits (-652)
Alternative Name(s): none recorded or not applicable
Type Area  Exposures on the northwest flank of Ardnandave Hill c.3km north of Ben Ledi, and on the west side of Loch Lubnaig. 
none recorded or not applicable
1:50K maps on which the lithostratigraphical unit is found, and map code used: