Fire, Coal & Magma: A Geology Tour from Ardrossan to Saltcoats with @ScottishGeologist
Step onto one of Scotland’s most geologically rich coastlines with @ScottishGeologist on this immersive field tour from Ardrossan to Saltcoats. This stretch of shore is a world-class natural classroom, showcasing volcanoes, tropical weathering, fossil forests, and spectacular magma intrusions—all within a walkable coastal section.
What to Expect
🌋 Ancient Volcanoes & Tropical Landscapes
Begin near Saltcoats where you’ll encounter the Troon Volcanic Member, formed by basaltic eruptions ~320 to 330 million years ago.
Analyse and learn about different igneous textures and how to identify them within volcanic igneous rocks
See how some of these lavas were later deeply weathered in a humid tropical climate, producing the rare Ayrshire Bauxitic Clay Member.
Learn how Scotland once sat near the equator, with rainforests, volcanoes, and intense chemical weathering and the difference between sandstone, mudstone, siltstone, limestone and coal.
🪨 The Saltcoats Main Sill – The Molten magma system
Explore one of the UK’s finest examples of a composite sill, around 18 m thick, formed by multiple pulses of magma.
Walk through its four distinct units:
Flow-banded analcime-dolerite (teschenite)
Biotite-rich dolerite with segregation veins (“lugarite”)
A thick central picrite (olivine-rich magma)
Altered lower dolerite (“white trap”)
See how magma interacted with surrounding rocks—baking coal into natural coke and altering margins with hydrothermal fluids.
🔥 Coal, Heat & Magma Interaction
Stand at the contact where the sill intruded the Kilwinning Main Coal seam.
See how heat transformed coal into columnar coke and released fluids that altered the intrusion.
Discover how geology directly records industrial processes before humans even mined the coal
🧭 Multiple Intrusions:
🌋 Younger Volcanic Activity (Palaeogene Dykes)
See NW-trending basaltic and andesitic dykes cutting through older rocks.
These formed during the opening of the North Atlantic (~60 million years ago).
Understand how Scotland was stretched and fractured during continental breakup.
🌊 Reading the Coastline
Walk along the intertidal zone where the sea reveals perfect cross-sections through the geology.
Observe how different rock types control coastal shape, erosion, and headland formation.
See how resistant igneous rocks form promontories, while softer sediments erode into bays.
👣 Hands-On Field Geology
Identify rock types: basalt, dolerite, picrite, sedimentary units.
Trace intrusion contacts and chilled margins.
Interpret the sequence of magma pulses and reconstruct the volcanic system.
Sketch the sill structure and build a geological timeline from field evidence.
Who Should Attend?
Perfect for general public, students, geology enthusiasts, and fossil lovers
Ideal for those wanting to see textbook igneous geology in the field
A must-visit for anyone interested in volcanoes, coal geology, or Scottish geological history
Event Details
📍 Location: Ardrossan to Saltcoats Coast, North Ayrshire
📌 Meeting point:
🗓️ Date: Sunday 10th May 2026 12:00-14:00. Pick up from Glasgow will be at 10:30
⏰ Duration: 2 to 3 hours
🎟️ Price: £25pp meet us there. Transport to/from Glasgow - £45pp
🥾 Terrain: Coastal foreshore, uneven rock platforms (tide-dependent) - Tour has been planned during low tide. 2 to 3km walk.
Why This Tour is Special
This is one of Scotland’s most important geological sites, where you can see:
With @ScottishGeologist, you won’t just see the rocks—you’ll decode them like a geologist in the field.
Book Your Ardrossan–Saltcoats Geology Tour
🌋 Ancient volcanoes
🔥 Magma intrusions
🌳 Fossil forests
🪨 Layered sills
This coastline doesn’t just show geology—it tells a complete story of Scotland’s past.
Fire, Coal & Magma: A Geology Tour from Ardrossan to Saltcoats with @ScottishGeologist
Step onto one of Scotland’s most geologically rich coastlines with @ScottishGeologist on this immersive field tour from Ardrossan to Saltcoats. This stretch of shore is a world-class natural classroom, showcasing volcanoes, tropical weathering, fossil forests, and spectacular magma intrusions—all within a walkable coastal section.
What to Expect
🌋 Ancient Volcanoes & Tropical Landscapes
Begin near Saltcoats where you’ll encounter the Troon Volcanic Member, formed by basaltic eruptions ~320 to 330 million years ago.
Analyse and learn about different igneous textures and how to identify them within volcanic igneous rocks
See how some of these lavas were later deeply weathered in a humid tropical climate, producing the rare Ayrshire Bauxitic Clay Member.
Learn how Scotland once sat near the equator, with rainforests, volcanoes, and intense chemical weathering and the difference between sandstone, mudstone, siltstone, limestone and coal.
🪨 The Saltcoats Main Sill – The Molten magma system
Explore one of the UK’s finest examples of a composite sill, around 18 m thick, formed by multiple pulses of magma.
Walk through its four distinct units:
Flow-banded analcime-dolerite (teschenite)
Biotite-rich dolerite with segregation veins (“lugarite”)
A thick central picrite (olivine-rich magma)
Altered lower dolerite (“white trap”)
See how magma interacted with surrounding rocks—baking coal into natural coke and altering margins with hydrothermal fluids.
🔥 Coal, Heat & Magma Interaction
Stand at the contact where the sill intruded the Kilwinning Main Coal seam.
See how heat transformed coal into columnar coke and released fluids that altered the intrusion.
Discover how geology directly records industrial processes before humans even mined the coal
🧭 Multiple Intrusions:
🌋 Younger Volcanic Activity (Palaeogene Dykes)
See NW-trending basaltic and andesitic dykes cutting through older rocks.
These formed during the opening of the North Atlantic (~60 million years ago).
Understand how Scotland was stretched and fractured during continental breakup.
🌊 Reading the Coastline
Walk along the intertidal zone where the sea reveals perfect cross-sections through the geology.
Observe how different rock types control coastal shape, erosion, and headland formation.
See how resistant igneous rocks form promontories, while softer sediments erode into bays.
👣 Hands-On Field Geology
Identify rock types: basalt, dolerite, picrite, sedimentary units.
Trace intrusion contacts and chilled margins.
Interpret the sequence of magma pulses and reconstruct the volcanic system.
Sketch the sill structure and build a geological timeline from field evidence.
Who Should Attend?
Perfect for general public, students, geology enthusiasts, and fossil lovers
Ideal for those wanting to see textbook igneous geology in the field
A must-visit for anyone interested in volcanoes, coal geology, or Scottish geological history
Event Details
📍 Location: Ardrossan to Saltcoats Coast, North Ayrshire
📌 Meeting point:
🗓️ Date: Sunday 10th May 2026 12:00-14:00. Pick up from Glasgow will be at 10:30
⏰ Duration: 2 to 3 hours
🎟️ Price: £25pp meet us there. Transport to/from Glasgow - £45pp
🥾 Terrain: Coastal foreshore, uneven rock platforms (tide-dependent) - Tour has been planned during low tide. 2 to 3km walk.
Why This Tour is Special
This is one of Scotland’s most important geological sites, where you can see:
With @ScottishGeologist, you won’t just see the rocks—you’ll decode them like a geologist in the field.
Book Your Ardrossan–Saltcoats Geology Tour
🌋 Ancient volcanoes
🔥 Magma intrusions
🌳 Fossil forests
🪨 Layered sills
This coastline doesn’t just show geology—it tells a complete story of Scotland’s past.
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