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A Tertiary Igneous Dyke
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A Tertiary Igneous Dyke
A Tertiary igneous dyke cutting through a sandstone deposit. The igneous rock pierced its way through the earths crust in a vertical fissure. The surrounding triassic sandstones have been baked and hardened by the heat of the intrusion. The location is the shore west of Kildonan Castle, south-west of the Isle of Arran, Scotland. Date: circa 1920
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Media ID 14118018
© Mary Evans / Grenville Collins Postcard Collection
Arran Baked Crust Cutting Deposit Dyke Fissure Hardened Heat Igneous Intrusion Isle Pierced Sandstone Shore Surrounding Tertiary Triassic Kildonan Sandstones
EDITORS COMMENTS
1. Title: A Tertiary Igneous Dyke: A Geological Marvel Cutting Through Triassic Sandstones at Kildonan Castle, Isle of Arran, Scotland 2.. This photograph showcases a remarkable geological feature, a Tertiary igneous dyke, piercing its way through the earth's crust and cutting through a deposit of Triassic sandstones. The image, taken circa 1920, captures the vertical fissure that allowed the molten igneous rock to intrude the earth's surface, leaving behind a testament to the dynamic forces that shaped our planet. 3. Background: The Tertiary period, which lasted from approximately 66 to 2.6 million years ago, was marked by numerous volcanic activities that led to the formation of various igneous intrusions. This particular dyke, located on the shore west of Kildonan Castle in the south-west of the Isle of Arran, Scotland, is a prime example of such geological phenomena. 4. Geological Impact: The surrounding Triassic sandstones have been baked and hardened by the intense heat of the intrusion, creating a striking contrast between the cool, sedimentary rocks and the hot, igneous dyke. The intrusion not only altered the geological structure of the area but also influenced the local ecosystem, potentially leading to the emergence of new habitats and species. 5. Historical Significance: The discovery and study of such geological formations have contributed significantly to our understanding of the earth's history and the processes that shaped our planet. This photograph, taken over a century ago, serves as a reminder of the rich geological heritage that continues to inspire scientific inquiry and exploration. 6. Location: The image was captured at the shore west of Kildonan Castle, a historic site on the Isle of Arran, Scotland. The Isle of Arran, known as "Scotland in Miniature," is renowned for its diverse landscapes and geological features, making it an ideal location for the study of geology and the exploration of natural wonders.
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