Arnold Escher von der Linth (8 June 1807 in Zürich – 12 July 1872) was a Swiss geologist, the son of Hans Conrad Escher von der Linth (1767–1823).
He made the first ascent of the Lauteraarhorn on 8 August 1842 together with Pierre Jean Édouard Desor and Christian Girard, and guides Melchior Bannholzer and Jakob Leuthold.
[3] With Bernhard Studer, he was the first to systematically explore the geology of the Swiss Alps and its neighboring regions (eastern Switzerland, Vorarlberg, Tyrol, Piedmont and Lombardy).
[4] In particular, his scientific liaison with the Scottish geologist Roderick Murchison (1792–1871) made him a contributor to the discovery of the Silurian system, and the first systematic description of sedimentary rocks and their index fossils.
[5] He was the author of Geologische Bemerkungen über das nordliche Vorarlberg und einige angrenzenden Gegenden (Geological observations on the northern Vorarlberg and some adjacent areas), published at Zürich in 1853.