The Flamborough Quaternary Research Group

Sewerby buried cliff,

Measurements of the sequence 26/10/2007 By Anne Horne, Mike Horne & Stuart Jones.

Measurements taken moving away from the edge of the buried cliff, going towards Bridlington.  Note no horizontal level taken,

Definitions -

Chalk - solid in-situ chalk.

Chalk pebbles - rounded pebbles of chalk, some bored by piddocks; plus some erratics, including grey flint. A raised beach deposit.

Chalk rubble - medium and large angular fragments of chalk - scree-like deposit.

Chalk gravel - fine to medium sub-angular and sub-rounded clasts of chalk - a Chalk Wash or solifluction deposit.

At the cliff edge -

[top]

• 1 m chalk gravel

• 1.1m chalk gravel and chalk rubble

• 0.8 m chalk rubble

• 0.1 m chalk pebbles

• > 0.7 m chalk

[bottom]

1 m from cliff -

• 0.9 m chalk gravel

• 0.7m  chalk gravel and rubble

• 0.8 m chalk rubble (note - ends 1.5m from cliff edge)

• 0.3m chalk pebbles

• > 0.5m chalk

2m from cliff -

• 0.7m chalk gravel

• 1.55m chalk gravel and rubble

• 0.3m chalk pebbles

• chalk

3m from cliff -

• 0.8 m chalk gravel

• 1.0m chalk gravel and rubble

• 0.4m chalk pebbles on right hand side

• (0.55m chalk pebbles on left hand side)

• chalk

•  

4m from cliff -

• 0.5m chalk gravel

• 0.6m chalk gravel and rubble

• 0.1m chalk pebbles

• 0.1m chalk gravel

• 0.55m chalk pebbles

• > 0.6m chalk

5.5m from cliff -

• 0.3m chalk gravel

• 0.3m chalk rubble

• 0.65m chalk pebbles

• chalk

• (note 25cm to left there is a 30cm step down in the chalk)

6m from cliff

• 0.7m blown sand with horizontal layers of chalk rubble

• 0.55m horizontally layered chalk gravel

• 0.6 m chalk gravel

• 0.9 m chalk pebbles

• chalk

• (note - 40cm to left is a 25cm step up in the chalk)

7m from cliff

• > 1m sand with horizontal layers of chalk rubble

• 0.5m horizontally layered chalk gravel

• 0.4m chalk gravel

• 0.55m chalk pebbles

• chalk

8 to 10 from cliff

• obscured

10m to 26.5 m from cliff

• Blown sand ca 6m high, with ca 1 m chalk gravel over it.

• Bottom covered by loose sand.

26.5m to 47m from cliff

• obscured

47m from cliff

• ca  4m sand with ca 1m chalk gravel above

54m from cliff

• sandy chalk gravel

• 2.7 m sand

• 0.2m  rotten chalk pebbles

• 0.5 m sand

• 1.2m chalk pebbles

58m from cliff

• > 2m sand

• >1m chalk pebble

58-61m from cliff

• obscured

65m from cliff

• chalk gravel

• 1.8 m sand

• > 1m chalk pebbles

70m from cliff

• > 2m chalk gravel

• 1.2m sand

• 1.3 m chalk pebbles

70 to 115m

• obscured

115 to 119m m from cliff

• (behind the Pill Box)

• boulder clay

• 2.2m layered chalk gravel dipping to left

• >0.9m silty sand

119m to 141m

• obscured

141 m from cliff

• boulder clay

• > 1.9m layered chalk gravel dipping to left

144m from cliff

• boulder clay

• 0.4m chalk rubble and gravel

• >1.5m layered chalk gravel dipping to left

150m from cliff

• boulder clay

• 0.3m chalk rubble and gravel

• 2m layered chalk gravel dipping to left

165m from cliff

• 2.6m layered chalk gravel dipping to left

170.5 m from cliff

• 2.6 m layered chalk gravel dipping to left

173m from cliff

• 0.15m chalk gravel

• 0.3m brown sandy silt

• 2.3m layered chalk gravel dipping to left

175m from cliff

• 0.15m brown sandy silt

• 2.1m layered chalk gravel dipping to left

•  

178m from cliff

• 0.1m brown sandy silt

• 2.0 m layered chalk gravel dipping to left

•  

181m from cliff

• 0.2m laminated brown sandy silt

• 1.9m layered chalk gravel dipping to left

183m from cliff

• 0.3m brown laminated sandy silt with layers of chalk gravel

• 1.8m layered chalk gravel dipping to left

185m from cliff

• 0.15m chalk gravel

• 0.15m brown sandy silt

• 1.7 m layered chalk gravel dipping to left

•  

186m from cliff

• 0.45m brown laminated sandy silt

• 1.6 m layered chalk gravel dipping to left

189.3m from cliff

• 0.25m contorted brown laminated sandy silt

• 1.8 m layered chalk gravel dipping to left

192m from cliff

• 0.55m  brown laminated sandy silt

• >1.4m layered chalk gravel dipping to left

193m to 194m from cliff

• hollow 1.8 m across filled with 15-20cm deep laminated sandy silt below 40cm brown sandy silt

• layered chalk gravel dipping to left

196m from cliff

• 0.1cm brown sandy silt

• layered chalk gravel dipping to left

200m from cliff

• 0.15m laminated brown sandy silt

• >1m layered chalk gravel dipping to left

204m from cliff and beyond

• obscured.

{fieldwork report by Mike Horne}

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