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The Flamborough Quaternary Research Group

Cliff measurements at Dane's Dyke Cliff South

Made 6/6/2004 by A Horne, D Gobbett, I Heppenstall, M Horne & S Jones.

 

Pegs at 1 metre intervals going "south" from Dane's Dyke measured above and below a level line:-.

 

Peg 0

Top of cliff

66cm sand

12 cm clay coarsening to silt

2cm dark brown clay

LINE

1cm dark brown clay

10cm silty clay

7cm brown laminated clay

65cm chalk wash

Chalk

 

Peg 1

Top of cliff

79cm bedded sand

7.5cm dark brown clayey silt

3.5cm brown silty clay

LINE

3cm brown silty clay

7cm laminated clays

Chalk wash

 

Peg 2

Top of cliff

127cm sand

12cm brown silts

6cm dark brown clay

5cm bedded clay

LINE

6cm bedded clay

60cm chalk wash

chalk

 

Peg 3

 ca 2 m layered sands

4cm dark brown clay

10cm silty clay with small chalk pebbles

7cm laminated clay

7cm chalk wash

LINE

35cm chalk wash

Chalk

 

Peg 4

Boulder clay with chalk pebbles

160cm sand

7cm dark brown clay

5cm silty clay with small chalk pebbles

10 cm laminated clay

13cm chalk wash

LINE

18cm chalk wash

Chalk

 

Peg 5

 

Sand

7cm dk brown silty clay

20cm brown laminated clay

25cm chalk wash

LINE

25cm Chalk wash

chalk

 

peg 6

top of cliff

10cm soil

80cm boulder clay with layers of more & larger chalk pebbles

300 cm boulder clay with a few small chalk pebbles

200cm bedded sands

13 cm silt

11 cm clay

6cm clay with small chalk pebbles

17cm clay

25cm chalk wash

LINE

26cm chalk wash

chalk

 

peg 6.5

surface - dip at top of chalk wash is 30 deg

 

peg 7

1-2 m sand

8cm silty clay

2cm clay

surface dip 20 degs to DD

60cm chalk wash

LINE

 

Peg 8

Ca 150cm sand

1 cm silty clay

105cm chalk wash

LINE

15cm chalk wash

 

peg 8.5

dip at top of chalk wash is 20 deg

 

peg 9

ca 150cm sand

2cm clay

125cm head

LINE

Chalk

 

Peg 10

Ca 150cm sand

2 cm silty clay

135cm chalk wash

LINE

60cm coarse deposits

storm beach

 

peg11 -TA 21451 69131

top of cliff

20cm soil

70cm pebbly boulder clay

1.1m cross bedded sand

1.7m chalk boulders

4.1m sand and rubble

1.4 m chalk wash

LINE

10cm chalk wash

38cm coarse chalky head

chalk

 

peg 12

ca 2 m sand

thin clay

140cm chalk wash (line near base)

1m coarse deposits

storm beach

 

peg 13

118cm chalk wash

30cm coarse chalky head

LINE

35cm coarse chalky head

crushed chalk

 

peg 14

155cm chalk wash

45cm coarse chalky head

LINE

25cm coarse chalky head

broken chalk

 

peg 15

170cm chalk wash

65cm coarse chalky head with some sandstone boulders

LINE

38cm coarse chalky head with some sandstone boulders

crushed chalk

 

peg16

185cm chalk wash

90cm coarse chalky head with some sandstone boulders

LINE

30cm coarse chalky head with some sandstone boulders

crushed chalk

 

peg 17

2 m chalk wash with thin sand layers 40 and 54 cm from base

40cm medium to coarse chalky head

70cm vertical chalk

LINE

 

Peg 18

Boulders

Sand

2.3m chalk wash with 3cm sand layer 50cm from base

60cm medium to coarse chalky head

marl band

40cm disturbed chalk

LINE

 

Peg 19

Boulders

Ca 80cm sand

Ca 3 m chalk wash

50cm medium to coarse chalky head

marl

20cm chalk

LINE

Note chalk dipping ca 45 deg away from DD

 

Peg 20

Ca 30cm sand

Ca 4m chalk wash

50cm medium to coarse chalky head

40cm dipping chalk

LINE

 

Peg 21

Boulders

Erosion surface

Ca 3m chalk wash

30cm medium to coarse chalky head

55cm chalk

LINE

 

Peg 22

Boulders

Erosion surface

Ca 2.8 m chalk wash

20cm medium to coarse chalky head

47cm chalk

LINE

 

Peg 23

Boulders

Erosion surface

Ca 2.6cm chalk wash

40cm medium to coarse chalky head

42cm dipping chalk

LINE

 

Peg 24

Boulders

Erosion surface

Ca 2.4m chalk wash

30cm coarse chalky head

30cm cryoturbated chalk

Line

30cm cryoturbated chalk

chalk

 

peg 25

boulders

erosion surface dipping away from DD

ca 1.8m chalk wash

50cm coarse chalky head

17cm cryoturbated chalk

LINE

70cm cryoturbated chalk

chalk

 

peg 26

boulders

erosion surface

ca 1.8m chalk wash

18cm coarse chalky head

60cm cryoturbated chalk

LINE

Chalk dipping towards DD

 

Peg27

Boulders

Erosion surface with slight dip towards DD

Ca 1.4 m chalk wash

1 m cryoturbated chalk

30cm chalk dipping towards DD

Line

chalk dipping towards DD

 

peg  ca 27.7 -  fault

 

peg 28

obscured

ca 1.9 m very crushed chalk

80cm chalk dipping away from DD

LINE

ca1.9m very crushed chalk

  

samples collected -

1 - laminated clays - peg 0

2 - brown silty clays - peg 0

3 - dark brown clay - peg 4

4 - sand - peg 4

 

{fieldwork report by Mike Horne}

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