Columbia subject headings:
Geology, Stratigraphic.
Geology--Scotland--History--19th century.
Geology--Scotland--Moray Firth.
Gordon, George, 1801-1893--Correspondence.
Murchison, Roderick Impey, Sir, 1792-1871--Correspondence.
Scotland--Description and travel.
Harvard subject headings:
Geology, Stratigraphic
Geology--Scotland--History--19th century.
Geology--Scotland--Moray Firth.
Gordon, George, 1801-1893--Correspondence.
Murchison, Roderick Impey, Sir, 1792-1871--Correspondence.
Scotland--Description and travel.
Princeton subject headings:
Geology, Stratigraphic.
Geology--Scotland--Moray Firth Region--History--19th century.
Geology--Scotland--Moray Firth Region.
Gordon, George, 1801-1893--Correspondence.
Murchison, Roderick Impey, Sir, 1792-1871--Correspondence.