Southern Region Chalk Group Lithostratigraphy: Sussex lithostratigraphy of Mortimore (1986a) - Shoreham Marls: Difference between revisions
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The paired Shoreham Marls, separated by c. 2 m of nodular chalk, locally formed into hardgounds (Bar End Hardgrounds), define the highest unit of the Lewes Member (Mortimore, 1986a). The upper of the two Shoreham Marls is typically the more strongly developed, although one or other seam might be cut out on the Bar End Hardgrounds in condensed successions (Mortimore, 1986a). Hollow-centred, tubular flints (Shoreham Flints), analagous to the Lewes Tubular Flints, occur above and below the upper of the two Shoreham Marls (Mortimore, 1986a). | The paired Shoreham Marls, separated by c. 2 m of nodular chalk, locally formed into hardgounds (Bar End Hardgrounds), define the highest unit of the Lewes Member (Mortimore, 1986a). The upper of the two Shoreham Marls is typically the more strongly developed, although one or other seam might be cut out on the Bar End Hardgrounds in condensed successions (Mortimore, 1986a). Hollow-centred, tubular flints (Shoreham Flints), analagous to the Lewes Tubular Flints, occur above and below the upper of the two Shoreham Marls (Mortimore, 1986a). | ||
Latest revision as of 12:49, 4 October 2013
The paired Shoreham Marls, separated by c. 2 m of nodular chalk, locally formed into hardgounds (Bar End Hardgrounds), define the highest unit of the Lewes Member (Mortimore, 1986a). The upper of the two Shoreham Marls is typically the more strongly developed, although one or other seam might be cut out on the Bar End Hardgrounds in condensed successions (Mortimore, 1986a). Hollow-centred, tubular flints (Shoreham Flints), analagous to the Lewes Tubular Flints, occur above and below the upper of the two Shoreham Marls (Mortimore, 1986a).
The rather sparse fauna associated with the Shoreham Marls mostly consists of the echinoids Micraster aff. turonensis and Echinocorys (Mortimore, 1986a).
Macrofossil Biozonation: top M. cortestudinarium Zone
Correlation: see Correlation with other Southern Region Chalk Group classifications
see Correlation with other UK Chalk Group successions
References
MORTIMORE, R N.1986a. Stratigraphy of the Upper Cretaceous White Chalk of Sussex. Proceedings of the Geologists' Association, Vol. 97(2), 97-139
See: marl, flint, hardground, Lewes Tubular Flints, Shoreham Flints