Geological Fieldwork Techniques course
logging data from Filey Brig
tutor: Mike Horne FGS
for the Centre for Life Long Learning
The logging was carried out on 10th May 2008, by three groups -- western section by Bruce, Dennis, James and Ros; middle section by Rodney, Tracy, Tony and David, who also then did a quick log of the eastern section; eastern section at low tide by Ian, Nina, Rod and Stuart.
In June 2011 Jan and Tony logged the western section
Tracy's record of the middle section:-
Log of Filey Brigg, Site 1 (GPS: TA 1292 8150)
(Group: Tony Barker, David Baker, Tracy Marsters & Rodney Evans 2008)
Bed A is overlaid by Quaternary boulder clay containing limestone pebbles from bed A.
Bed A
Medium grained limestone bed 0.37m in thickness. This is sandy coloured and contains angular fragments of minerals including what appear to be quartz, resulting in a rough surface. This shows a dip of 9Ú southward. Bivalve fossils present, one measuring 9cm x 5.5cm. This bed appears very fractured.
Bed B
Bed of a wet clay/sand matrix 0.07m in thickness with pieces of limestone similar to bed A present (possibly an ancient river bed?). Colour similar to bed A. fossil belemnites and burrows identified.
Bed C
Coarse grained limestone bed 0.86m in thickness. As with bed A it contains angular fragments of minerals including quartz and pyrite (pieces up to about 1cm in length). It is sandy coloured with some of the surface being stained black or dark brown. This limestone bed appeared harder than bed A and not as fractured. Fossil bivalves present.
Bed D
Fine grained sandstone bed 0.60m in thickness. This bed was sandy coloured and softer than the two limestone beds above. This bed was more uniform in grain size with a smoother surface. The exposed part of the bed showed a layering/step pattern (wave cut platforms). Fossils present including bivalves (cockle shells) and brachiopods (a rhynchonellid or possibly the bivalve Lopha).
Bed E
Coarse grained limestone bed 0.97m in thickness. This bed is darker greyish brown in colour and harder than the two limestone beds above. The worn surface appears bumpy in nature. Beds show dipping in a southerly direction towards the sea. This bed, like the bed above showed wave cut platforms, though they were longer and more prominent. Pieces of mica identified. Fossils identified that were either bivalves or brachiopods, plus an upside down oyster i.e. not in situ. Fossil burrows also identified (at the intersection of beds E and F.
Bed F
Fine grained sandstone bed 0.18m in thickness. Sandy coloured and soft in nature. Grains uniform in nature showing a smooth surface. No fossils identified.
Bed F is underlain by a bed of limestone, the bottom surface of which was not observable.
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Tracy's record of the eastern setion ( on an incoming tide)
Log of Filey Brigg, Site 2 (North Side of the Brigg)
(Group: Tony Barker, David Baker, Tracy Marsters 2008)
It was difficult to correlate bed F of site 1 to the beds at site 2. It was postulated that bed A at site 2 corresponded to bed F at site 1 (though this is not definite). These beds were not analysed in as much detail as at site 1 due to lack of time.
Bed A
Limestone 0.50m thick. Coarse with angular pieces of rock giving a sharp surface to the rock.
Bed B
Limestone 0.50m thick. Not as coarse as bed A and had a banded appearance.
Bed C
Limestone 0.90m thick. Finer grained than bed A and containing numerous shelly fragments.
Bed D
Sandstone 0.80m thick. Medium, rounded grained and hard. Brownish cream in colour and hard. Fossil shells identified in this bed.
Bed E
Sandstone 0.21m thick. Fine grained. Surface appears banded in nature but banding not visible inside, thus caused by differences in hardness of the sand grains. Soft and crumbly in texture and sand coloured.
Bed F
Sandstone 0.09m thick. Fine grained and unbanded. Harder in nature than bed E but not as hard as bed D. Sandy coloured.
Bed G
Sandstone 0.10m thick. Fine grained and surface banding visible as in bed E. Soft and crumbly in texture. Fossil shells visible within this bed.
Bed H
Sandstone 0.78m thick. Fine grained and unbanded. Medium harness and not as crumbly as above bed. Sandy coloured.
Bed I
Limestone 0.25m thick. Fine grained. Hard in nature and containing fossil shells.
Bed J
Limestone 0.57m thick. Angular pieces of rock present within this bed giving it a coarse grained appearance. Hard in nature.
Bed K
Limestone 0.19m thick. Fine grained and hard in nature. Parts of some burrows possibly identified.
Bed L
Limestone 1.96m thick. Coarser grained as in bed J with angular pieces of rock contained within it. Hard in nature.
Bed M
Sandstone 0.01m thick. Fine and crumbly in texture. Very thin band compared to other beds. No layering apparent.
Bed N
Limestone 0.60m thick. Fine grained and hard in nature. Grey in colour.
Bed O
Sandstone 0.42m thick. Fine grained and softish in nature. Sandy coloured.
Bed P
Limestone 0.47m thick. Fine grained and hard in nature. Greyish in colour.
Bed Q
Sandstone 0.85m thick. Coarse grained. Soft and crumbly in texture. Bottom of this bed not observable.
Stuart, Rod, Ian & Nina 2008
Above bed Z is a sandy deposit containing numerous fossils which include belemnites, Pectenids and other shelly fragments.
Bed Z Thickness – 80cm. Grey coloured shelly limestone. Numerous fossils are mainly broken into small fragments.
Bed Y Thickness – 30cm. Harder more consolidated grey shelly limestone. Numerous fossils are mainly broken into small fragments.
Bed X Thickness – 50cm. Extends out 7m from beds A and B. Shelly limestone. Numerous fossils are mainly broken into small fragments, Gryphaea and Pecten fragments can be identified. Beneath bed C is a small 2cm gap where clay once was.
Bed W Thickness – 30cm. Light coloured sandstone. Medium grained.
Bed V Thickness – 106cm. medium – coarse grained sandstone, the bed is heavily weathered. Fragments of fossil shells are identified.
Bed U Thickness – 130cm. Medium – coarse grained sandstone, the bed is heavily weathered. Fragments of fossil shells are identified.
Bed T Thickness – 10cm. Medium – coarse grained sandstone, the bed is heavily weathered. Fragments of fossil shells are identified. Fine laminar bedding can be seen.
Bed S Thickness – 13cm. Medium – coarse grained sandstone, the bed is heavily weathered. Fragments of fossil shells are identified.
Bed R Thickness – 30cm. Medium – coarse grained sandstone, the bed is heavily weathered. Fragments of fossil shells are identified. Fine laminar bedding can be seen.
Bed Q Thickness – 60cm. Extends out 11.8m from beds X-R. Fine grained sandstone layer approx 0.5cm over coarse oolitic limestone. Covered in black ? growth. Broken shell fragments are identified.
Bed P Thickness – 50cm. Fine grained sandstone, contains calcite. Fragments of broken shells are identified. Also covered by the same black ?growth as bed Q.
Bed O Thickness – 20cm. Medium grained sandstone. Fragments of broken shells are identified. Also covered by the same black ?growth as bed P and Q.
Bed N Thickness – 30cm. Fragments of broken shells are identified. Also covered by the same black ?growth as bed P, Q and O.
Bed M Thickness – 60cm. Extends 150 cm from bed N. Pale coloured sandstone. No fossils are identified.
Bed L Thickness – 40cm. Extends 130cm out from bed M. Sandstone. No fossils are identified.
Bed K Thickness – 45cm. Extends 270cm out from Bed L. Fine grained pale oolitic limestone. Fizzes on contact with acid. Contains a large number of various sized fossil burrows.
Bed J Thickness – 50cm. Extends 430cm out from Bed K. Coarse grained orangey coloured limestone/grit. Numerous fossil burrows are identified.
Bed I Thickness – 70cm. Extends 240cm out from Bed J. Limestone. One fossil broken pectin shell is identified. Contains burrows but these are narrower (0.5cm max diameter) than in the beds above. End of fracture.
Bed H Thickness – 50cm. Extends 80cm out from Bed I in some places but on the whole beds R and S finish at the same point.
Bed G Thickness – 60cm. Extends 12m 30cm out from Bed H. Light grey medium grained calcareous grit. Fizzes on contact with acid. Numerous fossils are seen some whole as well as broken. Whole Pectenids can be identified and measure between 2mm – 4cm.
Bed F Thickness – 120cm. Extends 300cm out from Bed G. Bed contains numerous burrows up to 1cm wide. Broken fossils are identified. One 70mm oyster shell is identified.
Bed E Thickness – 100cm. Extends 13m out from Bed F. The bed is broken up into pebbles of less than 1cm to very large boulders up to approx 3m2. Medium grained calcareous grit. Very hard. This bed contains very large burrows up to 4cm wide. Numerous fossils are identified in the large boulders, these include whole brachiopods up to 2cm in length and shell fragments.
Bed D Thickness – 80cm (estimated as partly under water). Extends 10m out from Bed E. Medium grained calcareous grit. Contains broken and whole pectin shells (up to 4cm in length.
Bed C Thickness – 70cm. Extends 25m out from Bed D. Medium grained calcareous grit. Contains broken shell fragments.
Bed B Thickness – 70cm. Extends 2m out from Bed C. medium grained calcareous grit.
Bed A Thickness unknown as this bed was at the sea edge. Extends 360cm out from Bed B. Medium grained calcareous grit. Contains iron nodules up to 10cm.
A fracture runs through beds Z – R.
Filey Logging by Jan Harrison and Tony Felski
western section
TA127816
Date 05/06/11
Bed
1. Base not seen, hard grey fine grain stone, fizzes strongly with acid. Contains broken bivalve and crinoids fragments.
2. 21cm thick medium grain grey stone, fizzes with acid and contains bivalve fragments and burrows. Irregular contact with bed below.
3. 70 cm thick medium grain sandy bed, fizzes slightly with acid. Orange brown colour. 3 layers. Irregular contact with bed below.
4. 16cm grey medium grain stone, fizzes with acid. Contains broken bivalves. Irregular contact with bed below.
5. 48cm medium grain brown sandy stone. Crumbly, fizzes slightly with acid. Irregular contact with bed below. Some broken shell fragments near top of bed.
6. 36 cm fine grain light brown crumbly stone. Sharp contact with bed below. Fizzes slightly with acid. Broken shell fragments near top.
7. 27 cm fine grain light brown stone, sandy texture, does not fizz with acid and no fossils. Some layering with regular black bands. Sharp contact with bed below.
8. 190 cm hard fine grain sandstone. Does not fizz with acid. Separated from bed below by 1 cm clay layer. Top of bed not seen
9. Covering of boulder clay, but exposure of rubbly limestone seen through boulder clay above bed 8.
copyright Mike Horne - 2019
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