Humberside Geologist no 16
Report of the East Riding
Boulder Committee
2011 to 2021
This is a list of glacial erratics found on field meetings of the Hull
Geological Society or records contributed by members and friends.
This list was compiled by Mike Horne** from fieldwork, with additional data
contributed by Anne Horne, Janet Harrison (Jan Robson), Richard Ablett, Jim
Whittaker and Stephen Whittaker.
The sites are arranged geographically. The order in which the erratics are
listed is a crude indicator of abundance. There are different lists for material
recorded in the boulder clay cliffs, beach exposures and loose on the beach. The
specimens recorded were seen loose on the beach unless otherwise specified.
Carnelian Bay - Cannon Ball Limestone, Lithostrotion in red Carboniferous
Limestone, syenite, Cardinia in limestone, Brockram, garnet gneiss,
Cheviot Porphyry (common), jasper, carnelian, New Red Sandstone, granite,
gneiss, yellow quartz, white quartz, Gryphaea,
amygdaloidal basalt, chert, Productids in Carboniferous Limestone, Larvikite,
muscovite schist, green Lake District conglomerate.
Speeton - Brockram, Norwegian porphyry, Cheviot porphyry, Lake District green
conglomerate, pink granite, gneiss, Corallian Limestone with Thalassonoides, jasper, Lithostrotion.
South Landing in situ in the "West
Nook Gravels" exposed in the cliff - black Cheviot Porphyry, black flint,
amygdaloidal basalt, gneiss, yellow quartz, Old Red Sandstone, limonite, brown
sandstone, red amygdaloidal lava, basalt, white quartz, porphyry, grey flint.
South Landing (on beach) - Jurassic plant bed, red granite, basalt, Old Red
Sandstone, Carboniferous Limestone.
Danes Dyke - Larvikite, black shelly Carboniferous, Limestone, New
Red Sandstone, black flint, grey flint, rhomb porphyry, pink granite.
Bridlington in
situ beach exposure of shelly till (Basement Till) - Arctica
islandica (broken shells), black flint, Gryphaea.
Barmston (north of road end) - black flint (common), New Red Sandstone, Old Red
Sandstone, Lithostrotion, black Carboniferous Limestone, Cannon Ball
Limestone, shelly Jurassic limestone, brown sandstone, granite, Jurassic rootlet
bed, porphyry, gneiss, yellow quartz (relatively rare), jasper, green sandstone,
Norwegian porphyry, ripple marked sandstone, Larvikite, red flint, brown
quartzite, Gryphaea,
red granite, red conglomerate.
Barmston cliff in
situ - Jurassic belemnite, basalt, jasper, yellow quartz,
jasper, Dactylioceras
commune, Magnesian Limestone, brown quartzite, green chert,
grey-brown sandstone, Carboniferous Limestone, pale brown sandstone.
Barmston (south of Barmston Drain) - black flint, Chalk, Arnioceras,
granite, porphyry, Cheviot Porphyry, white quartz, "Haggis Rock", brown flint,
Old Red Sandstone, Gryphaea,
grey flint.
Ulrome - pyrite crystals.
Skipsea beach - jet, corals in red Carboniferous Limestone, Larvikite.
Skipsea Cliff in
situ in the cliff - Chalk (common), grey flint, belemnite from the
Speeton Clay, black shale, black flint, Gryphaea, Jurassic belemnite,
Tilberthwaite Tuff, ice-scratched Carboniferous Limestone. "porphyry, medium
grained", yellow chalk (bored by sponges when on a beach), phosphate nodule,
banded grey flint, pale brown layered sandstone, red sandstone with crinoid
stem, grey sandstone, gneiss, white vein quartz, New Red Sandstone,
ironstone nodule, dark grey shale, orange quartzite, yellow quartz, dark
grey sandstone, coal, ? rhyolite, pink granite, grey
mudrock, pale grey careous flint, Old Red Sandstone, jet, dolerite,
basalt, Larvikite, green jasper, pink quartzite, Carboniferous Limestone,
Magnesian Limestone, Jurassic rootlet bed.
Skipsea Withow Mere in
situ in cliff - Norwegian Porphyry, Jurassic rootlet bed,
ice-scratched Carboniferous Limestone, New Red Sandstone, Chalk.
Skirlington beach - Hildoceras.
North of Mappleton (ca. TA 225 447) in situ in the Red Band in cliff and
beach exposure (TA 224 446) - grey sandstone, New Red Sandstone, yellow
quartz, black mudstone, Carboniferous Limestone, Magnesian Limestone, red
mudstone, brown quartzite, white quartz, green conglomerate, charcoal, Gryphaea, ?
Hibolithes, dark grey flint, Old Red Sandstone, pale grey septarian
nodule, green jasper, Tilberthwaite Tuff, coarse orange sandstone. Note - almost
no Chalk.
Mappleton (in situ in cliff) - Jurassic belemnite, Chalk, red chalk, pink
chalk, Middle Jurassic Sandstone, New Red Sandstone, Old Red Sandstone, Gryphaea,
black flint, septarian nodule, Hibolithes, NeoHibolithes,
Kimmeridge Clay, porphyry, Pecten in grey sandstone, yellow quartz, black
shelly Carboniferous Limestone.
Mappleton going south - Quartz, Canninia, Chalk, crinoidal Carboniferous
Limestone, Lithostrotion, black flint, pink chalk, Cheviot porphyry, Polyptichites,
Jurassic belemnite, Kimmeridge Clay, red granite, Gryphaea, coal, Pecten in
Jurassic limestone, Oxyteuthis, belemnite in soft Chalk raft, New Red
Sandstone, Middle Jurassic Sandstone, Norwegian Porphyry, Pentacrinus,
Jurassic oolitic limestone, Jurassic plant bed, Kellaways belemnite, Offaster,
Cardinia, grey flint, Kimmeridge septarian nodule, Dactyllioceras
tennuicostatum, Arnioceras, Echinocorys, jasper, D. commune,
horsetail tree trunk, red flint, brown sandstone, basalt, pyrite, Acroteuthis,
Larvikite, quartzite, green jasper, Exogyra,
Cannon Ball Limestone, Speeton Clay nodules, gneiss, ice-scratched Chalk, rusty
brown sandstone, Gonioteuthis, Infulaster, Hildoceras, Belemnitella
mucronata, Asteroceras, black Cheviot Porphyry, brecciated Chalk, Pseudomytilloides dubius. Gryphaea in
shelly limestone, ripple marked shale, green sandstone, red chalk, sandstone
with trace fossils, Dogger, Chalk bored by piddocks, belemnite from the Speeton Clay,
septarian nodule from the Speeton Clay, fossil wood, NeoHibolithes,
ice-scratched Carboniferous Limestone, black shelly Carboniferous Limestone, Modiolus..
Aldborough - Lithostrotion,
fossil wood, Phylloceras.
North of Sand-le-Mere - ca. 305325 - in situ in the cliff in "Withernsea
Till" - New Red Sandstone, Carboniferous Limestone, brown sandstone, coal,
Chalk, late Cretaceous belemnite, coarse grey sandstone.
North of Sand-le-Mere - ca. 305325 – in
situ on the beach - Lithostrotion (common), Gryphaea (relatively
rare) Dactylioceras, red Norwegian Porphyry, Larvikite (relatively
common), brown septarian nodules (relatively common), Dogger, black flint,
Chalk, Middle Jurassic rootlet bed, carnelian, yellow quartz, basalt, Old Red
Sandstone, dark grey gneiss, large grey septarian nodules (from the Kimmeridgian
and/or Speeton Clay), red flint, NeoHibolithes, pyrite, pink chalk,
granite, green conglomerate, Jurassic fossil wood, Pleuroceras, Lithostrotion in
red limestone, Frosterly Marble.
Sand-le-Mere in situ in
the cliff - Chalk, coal, New Red Sandstone, Kimmeridge Clay.
Sand-le-Mere - on the beach - Norwegian Porphyry, Cheviot porphyry, Dactylioceras
commune, Lithostrotion (common), gneiss, augen gneiss*, grey flint,
jasper, Whin Sill, Larvikite*, red granite, Chalk, vesicular basalt, yellow
quartz, white quartz, shelly Jurassic limestone, Frosterly Marble, Gryphaea,
red flint, grey granite, carnelian, orange agate, ironstone, Pentacrinus,
green jasper, Feldspar pegmatite*, Old Red Sandstone, Arnioceras. [* are
these natural erratics or have they been transported from sea defences?]
Withernsea beach ca. 500m north of North Promenade - jasper, white quartz, Lithostrotion, Gryphaea,
black flint, chert, gneiss, New Red Sandstone, Old Red Sandstone, Dactylioceras,
Chalk, dolerite, middle Jurassic Rootlet Bed, Carnelian, Cheviot Porphyry,
Larvikite, yellow quartz, grey flint, pink granite, Dogger, Inoceramus,
brown sandstone, crinoidal Carboniferous Limestone, Lower Jurassic shelly
limestone, red flint, bored chalk, echinoid in black flint, amygdaloidal basal,
belemnite from the Chalk, green slag (not an erratic).
Withernsea in
situ in the cliff south of the Promenade (now hidden by 2021 sea
defences) - Chalk, black igneous rock, Old Red Sandstone, New Red Sandstone,
brown sandstones, grey flint, black flint, ?chert, coal, shale.
Withernsea beach south of the Promenade - Black flint, Gryphaea, Lithostrotion,
grey flint, pale brown sandstone, white quartz, yellow quartz, basalt, Jurassic
grey rootlet bed, pink chalk, Arnioceras,
belemnite from the Chalk, red flint, pink gneiss, New Red Sandstone.
Withernsea beach south of the 2021 sea defences - Chalk, New Red
Sandstone, grey flint, yellow micaceous sandstone.
Withernsea south of the 2021 sea defences in
situ in the cliff - Chalk, New Red Sandstone, Carboniferous
Limestone, coal (common), black flint, yellow micaceous sandstone, basalt, Acroteuthis, Harpoceras, Magnesian Limestone, grey
flint, pink granite, grey shale, Gryphaea,
grey sandstone, yellow quartz, Pecten in
mudstone, Middle Jurassic Plant Bed, grey chert, pink chalk, brown porphyry,
brown sandstone, orange sandstone, buff sandstone, jasper veins in red
sandstone, ? chert, red chalk, white vein quartz, Old Red Sandstone, Pseudomytilloides
dubius, shale, Jurassic belemnite.
Easington Beach - yellow quartz, white quartz, dolerite, Cheviot
porphyry, Lithostrotion, black
shelly limestone, pink granite, black flint, "dogger", gneiss, jasper, pyrite,
grey flint, Norwegian porphyry, Gryphaea in
limestone, Old Red Sandstone, septarian nodule (? Kimmeridgian), crinoidal
Carboniferous Limestone, Liassic ammonite, Chalk, brown sandstone, red flint.
Note - the Larvikite on the beach probably comes from the sea defences for the
Gas Terminal.
Easington walking north from Seaside Road, in
situ beach exposure of shelly till (probably "Basement Till") - Arctica
islandica (broken shells), Chalk, black flint, Gryphaea,
sandstones, pale grey chert, jasper, gneiss, Middle Jurassic rootlet bed, coal,
Old Red Sandstone, dark red sandstone, amygdaloidal basalt, Cheviot
Porphyry, pink syenite, Scrobicularia, Macoma, pink
quartzite, white quartz. . Note - no grey flint.
Kilnsea beach (site of the Godwin Battery, now on the beach) - Old
Red Sandstone, New Red Sandstone, Lithostrotion,
grey flint, black flint, Gryphaea,
Larvikite, Cheviot Porphyry, white quartz, yellow quartz, granite, Norwegian
Porphyry, Middle Jurassic rootlet bed, carnelian, red flint, gneiss.
Kelsey Hill - Ostrea, Cardium,
grey flint, Gryphaea.
Keyingham New Pit (south of the main road) - Gryphaea, Exogyra,
black flint, vesicular basalt, weathered Chalk pebbles, rhomb porphyry,
oysters, Scrobicularia
fluminaris, cockles, quartzite, ammonite in orange sandstone, grey
flint, jasper, gneiss, crinoidal Carboniferous Limestone, red granite, belemnite
from the Chalk, carnelian, Jurassic belemnite, Old Red Sandstone, coal, whelk,
yellow quartz, rotten grey granite, Chalk, pale brown cross-bedded sandstone, Inoceramus in
flint, scaphopods, winkles, Buccinum, Astarte, Corbicula.
Keyingham Old Pit in
situ "Basement Till" - Gryphaea, Jurassic belemnites, brown
sandstone, yellow sandstone, Chalk.
Keyingham Old Pit - Whin Sill, Brockram, Shap Granite, Asteroceras,
gneiss, Kimmeridge Clay, ammonite in Kimmeridge Clay, black flint, grey flint,
red flint, granite, ironstone, brown sandstone, Jurassic plant bed, New Red
Sandstone, Cheviot Porphyry, weathered dolerite, piddock-bored Chalk, Magnesian
Limestone, Old Red Sandstone, Larvikite, Lithostrotion, Norwegian
porphyry, fossil horsetail, garnet schist, coal.
Keyingham (mixed pits) - Flamborough Chalk sponges, grey flint,
black flint, Gryphaea,
red flint, porphyry, Old Red Sandstone, New Red Sandstone, Lower Jurassic shelly
limestone. sandstones, jasper, Kimmeridge Clay, Dogger, Brockram, Shap Granite,
lignite, basalt, brown sandstone, ironstone, pink quartz, brown flint, Jurassic
belemnite, Arnioceras,
flow banded rhyolite, garnet schist, Chalk bored by piddocks, Lithostrotion.
Red Cliff, near North Ferriby - Chalk, Kimmeridgian ammonite in shale, grey
flint, black flint, ice scratched Carboniferous Limestone, Old Red Sandstone,
brown sandstone, grey quartz, yellow quartz, white quartz, yellow sandstone, B.
mucronata, grey porphyry, carnelian, gneiss, Middle Jurassic rootlet bed,
limonite, quartzite, ice scratched Chalk, Gryphaea, jasper, Chalk pebble
with small borings.
South Ferriby Foreshore (Lincolnshire) on beach - crinoidal
Carboniferous Limestone, grey granite, Old Red Sandstone, scaphopods in shelly
Lower Jurassic limestone, basalt, New Red Sandstone, ice-scratched Carboniferous
Limestone, porphyry.
References/further reading:
Harrison R & M Horne 1992. The East Yorkshire Boulder Committee, report for the
years 1987 to 1991. Humberside Geologist 10, 18-22.
Horne M 1992. Starting Geology in East Yorkshire. Humberside Geologist 10,
13.
Horne M 2000. Report of the East Riding Boulder Committee 1992 to 2000. Humberside
Geologist 13, 42-45
Rockett T 1992. Glaciation and the Yorkshire Coast. Humberside Geologist 10,
14.
** Mike Horne FGS, Honorary Fellow, Department of Geography,
Geology and Environment, University of Hull.
copyright Hull Geological Society 2021