An authentic vintage educational photographic postcard published by the Geological Survey and Museum, London (No. B.260).

Details:

- Front: Features a detailed geological view titled "Tertiary Igneous Dyke Cutting Sandstone" on the shore west of Kildonan Castle, Island of Arran, Scotland. Includes a printed descriptive paragraph explaining the volcanic formation and the baking of Triassic sandstones.

- Reverse: Unposted divided back, printed by B. Matthews, Bradford, England. Free of any handwriting, stamps, or postal markings.

- Era: Mid-20th Century (circa 1930s - 1950s).

- Condition: Excellent vintage condition. Exceptionally clean front and back with sharp corners and crisp edges. Please examine the high-resolution images of PC1091-F.jpg and PC1091-B.jpg to assess the exact condition.

A wonderful and unusual addition for collectors of Scottish local history, Isle of Arran topographical views, or those specializing in academic geology and museum-published postcards.

Will be shipped securely in a protective sleeve and board-backed envelope.