The Geomon logo painted specially by Sir Kyffin Williams Contact john at john.conway@rac.ac.uk
carboniferous rocks at Moel y Don
Irish Sea Till overlying red marls at the Mermaid. Known as Carboniferous red beds but remarkably similar to Keuper marls
detail of red marls at the Mermaid
Newborough Warren - an extensive area of blown sand with a mosaic of hydrological and soil conditions and wonderful biodiversity.
Pillow lavas, Llanddwyn
dolerite intruded into green schists, Porth Nobla
porphyritic centre to dolerite dyke
dolerite dyke intruded into Gwna limestones, Llanddwyn island
Malltraeth marsh
remains of coal mine on Malltraeth Marsh
unconformity between precambrian [left] and overlying carboniferous rocks, Malltraeth
braided and anastamosing stream patterns on beach .....
glacial erosion surface in green schists overlain by glacial deposits
ice wedge casts in glacial till, can be seen in many places around hte coastline
nodular concretionary layer in gley soil in glacial deposits, Porth Cwyfan
raised beach, Rhosneigr
Rhoscolyn beds
Bwa Gwyn, Rhoscolyn Head
Holyhead mountain - quartzite - seen from the south over South Stack series meta-turbidites
The standing stones that inspired Sir Kyffin Williams to desing the Geomon logo
Ty Mawr, iron age hut circles, South Stack Moor
Ty Mawr hut circles immediately after 1980s excavation
maritime heathland on South Stack Moor
podsol profile on South Stack moor
anticline - syncline couple in South Stack beds below lighthouse
glacial surface on South Stack moor - with fine striations and boulder still in place?
view over Breakwater Country Park from top of Holyhead Mountain
Carboniferous limestone used for decorative parts of the Holyhead Breakwater
Holyhead Breakwater - limestone blocks over quartzite blocks
waves breaking over the breakwater, April 2008
the breakwater [foreground] built over an exposure of New Harbour schists, with Holyhead Mountain [quartzite] in the background
Breakwater Country Park, close-up of foliation in New Harbour schist
Breakwater Cove, storm beach in foreground
Breakwater Cove, South Stack beds, storm beach in foreground
Breakwater Country Park, narrow inlet eroded along site of dolerite dyke
roche moutnonee type features at Breakwater Park
Breakwater Country Park, gley soil profile in glacial deposits
sapheroidal weathering in the Tertiary dolerite dyke in Porth Namarch
Breakwater Country Park, thrust in Porth Namarch
the shingle bar in Cemlyn
Cemaes - Llanbadrig : precambrian limestone, quartzite and melange
Llanbadrig : precambrian limestone
Gwna melange
Ordovician conglomerates, Porth Wen
Winding gear at head of incline, Porth Wen brickworks
Porth Wen brickworks
Parys copper mine
borehole samples drilled at Parys Mountain in the 1990s
precipitation pits on parys Mountain
Porth Amlwch - built to export copper concnetrates from Parys mountain
carboniferous conglomerate
waterworn limestone, Moelfre
limestone bedding plane - or is it glacial erosion surface? ideal precursor to pavement formation. Irish Sea Till overlying on right hand side
Din Lligwy - iron age homestead built of carboniferous limestone pavement blocks
the Lligwy Bay "disturbance" within carboniferous limestone
Carboniferous limestone
Carboniferous sandstone, Helaeth Bay
Carboniferous limestone corals
"sandstone pipe" Red Wharf Bay - infilled contemporary karst feature
view across Red Wharf Bay - carboniferous limestone overlying precambrian schists
carbonate cemented sands and gravels within the glacial deposits on Llanddona beach
Devensian glacial deposits, Lleiniog
Shap granite erratic within Devensian glacial deposits, Lleiniog
Coal fragments within Devensian glacial deposits, Lleiniog
corals in carboniferous limestone
glacial erratic, Porth Lliana
Trefignath burial chamber
crossed bedded Namurian sandstone, Malltraeth
carved stone, Bryn Celli Ddu burial mound
Devonian rocks, Lligwy
view from Bodafon Mountain to Dulas
load cast near Bwa Gwyn
lugworm burrows picked out by faint oxidised iron coatings - suggests how trace fossils might form
ripple marks on a sandy beach
samphire growing o n saltmarsh
my dog gives the scale to this sand bar on Rhosneigr beach
sea potato
residual boulders from erosion of boulder clay
picrite erratic lying on green schist
clsoe up of picrite boulder
Church Bay tuffs
Orodvician shales
Chough!
Amlwch beds
view from Pen Las rock, note dyke along base of cliffs in South Stack beds
Menai Bridge - just one of many edifices built from carboniferous limestone
