Geological Survey of England and Wales, Horizontal sections

Sections were the first attempt by the Survey to indicate 'the arrangement of rocks beneath the surface'. Undertaken on the scale of six inches to the mile they were coloured in accordance with the one-inch geological maps. The lines were very carefully surveyed and complete notes of the geology traversed were made. They were issued with a short explanatory pamphlet. The Horizontal Sections were engraved on copper and published on sheets and may include up to six lines or 36 miles of sections. About 148 sections were published between 1844 and 1894.

Maps in this series are out of print. Copies can be purchased 'print on demand'. To purchase follow the link on a maps Full record page.

Sheet number Sheet title Published year Variant View record
1  Horizontal section 1. No. 1. Section from Porth-wyn, St. Bride's Bay, near Solva, Pembroke, to the north cliff of Ynys-y-Barry; on a line 10 degrees W. of N. from Porth-wyn to the cross-roads near Skyvog Common; and 5 degrees E. of N. from thence to the sea. 2. Section across Pembrokeshire, from S. to N. From St. Govans Head to Lanstadwell, from Lanstadwell to Tref-garn Rock, and from thence to Dinas Head, near Fishguard from St. Govan's Head to Dinas Head, near Fishguard. Reference geological maps 38, 40. 1845  1  Full entry
1  Horizontal section 1. No. 1. Section from Porth-wyn, St. Bride's Bay, near Solva, Pembroke, to the north cliff of Ynys-y-Barry; on a line 10 degrees W. of N. from Porth-wyn to the cross-roads near Skyvog Common; and 5 degrees E. of N. from thence to the sea by Andw. C. Ramsay. No. 2. Section across Pembrokeshire, from S. to N. From St. Govans Head to Lanstadwell, from Lanstadwell to Tref-garn Rock, and from thence to Dinas Head, near Fishguard from St. Govan's Head to Dinas Head, near Fishguard. Reference geological maps 38, 40. 1845  2  Full entry
1  Horizontal section 1. No. 1. Section from Porth-wyn, St. Bride's Bay, near Solva, Pembroke, to the north cliff of Ynys-y-Barry; on a line 10 degrees W. of N. from Porth-wyn to the cross-roads near Skyvog Common; and 5 degrees E. of N. from thence to the sea by Andw. C. Ramsay. No. 2. Section across Pembrokeshire, from S. to N. From St. Govans Head to Lanstadwell, from Lanstadwell to Tref-garn Rock, and from thence to Dinas Head, near Fishguard from St. Govan's Head to Dinas Head, near Fishguard. Reference geological maps 38, 40. 1845  3  Full entry
1  Horizontal section 1. No. 1. Section from Porth-wyn, St. Bride's Bay, near Solva, Pembroke, to the north cliff of Ynys-y-Barry; on a line 10 degrees W. of N. from Porth-wyn to the cross-roads near Skyvog Common; and 5 degrees E. of N. from thence to the sea by Andw. C. Ramsay. No. 2. Section across Pembrokeshire, from S. to N. From St. Govans Head to Lanstadwell, from Lanstadwell to Tref-garn Rock, and from thence to Dinas Head, near Fishguard from St. Govan's Head to Dinas Head, near Fishguard. Reference geological maps 38, 40. 1857  1  Full entry
1  Horizontal section 1. No. 1. Section from Porth-wyn, St. Bride's Bay, near Solva, Pembroke, to the north cliff of Ynys-y-Barry; on a line 10 degrees W. of N. from Porth-wyn to the cross-roads near Skyvog Common; and 5 degrees E. of N. from thence to the sea by Andw. C. Ramsay. No. 2. Section across Pembrokeshire, from S. to N. From St. Govans Head to Lanstadwell, from Lanstadwell to Tref-garn Rock, and from thence to Dinas Head, near Fishguard from St. Govan's Head to Dinas Head, near Fishguard. Reference geological maps 38, 40. 1857  2  Full entry
2  Horizontal section 2. No. 1. Section from the Sea, near Tenby, through Saundersfoot, to Landewi Velfrey, Pembrokeshire. (Vertical Section, 13.) No. 2. Section from near Cil-rhew through Lampeter Velfrey, and Panteg, to near Hendre, Pembrokeshire. No. 3. Section through Pant Yiar and Clog-y-Fran on a line N. 14 degrees East, Caermarthenshire. (Vertical Section, 13.) No. 4. Section from Laugharne across the River Taf, to the River Dewi Fawr, on a line N. 17 degrees West, Caermarthenshire. No. 5. Section from Maes Gwrda by St. Clairs to Mydrim, Caermarthenshire. (Vertical Section, 13.) No. 6. Section across the Traps and Conglomerates of Pen-y-Moelfre, S.W. of Caermarthen. Reference geological maps 38, 40, 41. 1844  1  Full entry
2  Horizontal section 2. No. 1. Section from the Sea, near Tenby, through Saundersfoot, to Landewi Velfrey, Pembrokeshire. (Vertical Section, 13.) No. 2. Section from near Cil-rhew through Lampeter Velfrey, and Panteg, to near Hendre, Pembrokeshire. No. 3. Section through Pant Yiar and Clog-y-Fran on a line N. 14 degrees East, Caermarthenshire. (Vertical Section, 13.) No. 4. Section from Laugharne across the River Taf, to the River Dewi Fawr, on a line N. 17 degrees West, Caermarthenshire. No. 5. Section from Maes Gwrda by St. Clairs to Mydrim, Caermarthenshire. (Vertical Section, 13.) No. 6. Section across the Traps and Conglomerates of Pen-y-Moelfre, S.W. of Caermarthen. Reference geological maps 38, 40, 41. 1844  2  Full entry
2  Horizontal section 2. No. 1. Section from the Sea, near Tenby, through Saundersfoot, to Landewi Velfrey, Pembrokeshire. (Vertical Section, 13.) No. 2. Section from near Cil-rhew through Lampeter Velfrey, and Panteg, to near Hendre, Pembrokeshire. No. 3. Section through Pant Yiar and Clog-y-Fran on a line N. 14 degrees East, Caermarthenshire. (Vertical Section, 13.) No. 4. Section from Laugharne across the River Taf, to the River Dewi Fawr, on a line N. 17 degrees West, Caermarthenshire. No. 5. Section from Maes Gwrda by St. Clairs to Mydrim, Caermarthenshire. (Vertical Section, 13.) No. 6. Section across the Traps and Conglomerates of Pen-y-Moelfre, S.W. of Caermarthen. Reference geological maps 38, 40, 41. 1844  3  Full entry
3  Horizontal section 3. No. 1. Section near Llandeilo, fawr from Cerrig-dwfn to Mynydd-banc-y-ffair. No. 2. Section from near Llandibie to Llangathen near Llandeilo fawr. No. 3. Section from the Black Mountain, near Llangadoc, to Cefn-llwyn hir, near Cynfil Cayo Caermarthenshire. (Vertical Section, 14.) [Map 41.] 1844  1  Full entry
3  Horizontal section 3. No. 1. Section near Llandeilo, fawr from Cerrig-dwfn to Mynydd-banc-y-ffair. No. 2. Section from near Llandibie to Llangathen near Llandeilo fawr. No. 3. Section from the Black Mountain, near Llangadoc, to Cefn-llwyn hir, near Cynfil Cayo Caermarthenshire. (Vertical Section, 14.) [Map 41.] 1844  1  Full entry

See also