Editing Dundrennan Ranges, Gipsy Point - an excursion

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==== 5 Mullock Bay: Mullock Bay Unit ====
 
==== 5 Mullock Bay: Mullock Bay Unit ====
About 1 km further east, excellent sections in the Mullock Bay Unit of the Raeberry Castle Formation are well exposed along the shore. The beds here yield graptolites of the ''ellesae ''and ''lundgreni ''biozones, and are distinguished by having more hemipelagite and less sandstone than any of the other units seen along this section. Kemp (1987) divided these into two members. Member A consists of thinly bedded fine sandstones, siltstones and mudstones, alternating with channelised arenites and rudites. They are quite like the B Member of the Gipsy Point Unit, and like them are interpreted as having formed in a channel-levee system on a submarine fan. The B Member consists of a complex of alternating thin- to medium-bedded sandstones and shales, with occasional coarser horizons considered to represent prograding depositional lobes.
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About i km further east, excellent sections in the Mullock Bay Unit of the Raeberry Castle Formation are well exposed along the shore. The beds here yield graptolites of the ''ellesae ''and ''lundgreni ''biozones, and are distinguished by having more hemipelagite and less sandstone than any of the other units seen along this section. Kemp (1987) divided these into two members. Member A consists of thinly bedded fine sandstones, siltstones and mudstones, alternating with channelised arenites and rudites. They are quite like the B Member of the Gipsy Point Unit, and like them are interpreted as having formed in a channel-levee system on a submarine fan. The B Member consists of a complex of alternating thin- to medium-bedded sandstones and shales, with occasional coarser horizons considered to represent prograding depositional lobes.
  
 
Return to Port Muddle along the cliff top or the shore.
 
Return to Port Muddle along the cliff top or the shore.

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