John MacCulloch (6 October 1773 – 21 August 1835) was a Scottish geologist, surgeon and civil engineer.

Among his other works the following may be mentioned: A Geological Classification of Rocks with Descriptive Synopses of the Species and Varieties, comprising the Elements of Practical Geology (1821); The Highlands and Western Isles of Scotland, in a series of letters to Sir Walter Scott (4 vols. 1824); A System of Geology, with a Theory of the Earth and an Examination of its Connection with th Sacred Records (2 vols. 1831); Proofs and Illustrations of the Attributes of God, from the Facts and Laws of the Physical Universe: Being the Foundation of Natural and Revealed Religion (3 vols. 1837).

During his honeymoon in Cornwall he was killed by being dragged along in the wheel of his carriage.

Attached is a self portrait he drew in April 1821 he talked of hanging and shooting himself during a stormy meeting regarding if he was not allowed to finish the mineralogical map of Scotland. (Reproduced courtesy of the Geological Society of London).

(Attached is the mineralogical map of Scotland).

His writings and drawings were spectacular.
Read more about him here:

Dr John MacCulloch MD was a pioneer of geological cartography.

Prior to his surveys there had been few attempts to map and survey Scotland.
MacCulloch's geological map of Scotland, published posthumously in 1836, remains one of the great cartographic milestones in the history of geology.

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