02980cam a22003133u 4500 78665 UtSlPG 20260610134826.0 m cr n 260607r20261922utu|||||o|||||||||||||| d UtSlPG fr iso639-1 DT QE Gautier, E. F. (Emile Félix), 1864-1940 Structure de l'Algérie Salt Lake City, UT : Project Gutenberg, 2026 1 online resource : multiple file formats text txt rdacontent computer c rdamedia online resource cr rdacarrier Release date is 2026-05-12 Galo Flordelis (This file was produced from images generously made available by The Internet Archive/University of Toronto) "Structure de l'Algérie" by E. F. Gautier is a geological and geographical treatise written in the early 20th century. It synthesizes Algeria’s topographic and geological records to explain the country as a segment of the Atlas within the wider Alpine system. The work emphasizes how a resistant Tyrrhenian block to the north, the Saharan platform to the south, and major north–south tectonic accidents shaped the relief, basins, and even cultural regions. The opening of this treatise states its aim—a first synthesis made possible by Algeria’s exceptional mapping—then frames the land as “a piece of the Atlas” tied to Alpine folding and deflection around the Tyrrhenide. It argues for the Tyrrhenide’s role using coastal crystalline outcrops, volcanic chains, seismicity, and biogeographic clues, and turns to north–south structures that cut the east–west chain: a Touat-to-Roussillon line revealed by the oasis “street,” the Zousfana gorge at Figuig, the Tamlelt breach, and offshore alignments toward Alboran. It next traces a Hoggar–Laghouat–Médéa dorsal ridge that continues into the Tell, marking the frontier between the Kabylian mountains and the western sublittoral plains and anchoring historic centers like Achir, Médéa, Miliana, Cherchell, and Algiers. The text then presents the Biskra breach linked to the Igharghar syncline, and the Djerid crossroads in Tunisia, to show an orthogonal grid where strong north–south accidents intersect Alpine east–west folds with notable human consequences. At the start of Book II, it briefly reviews the elusive primary basement and concentrates on Algeria as a long-lived marine geosyncline, outlining successive Cretaceous–Eocene incursions with deep bathyal facies in the Tell and shallower neritic or continental facies on the southern platform. (This is an automatically generated summary.) Originally published: Paris: Société d'éditions géographiques et scientifiques, 1922 Geology -- Algeria https://archive.org/details/structuredelalg00gautuoft https://www.gutenberg.org/ebooks/78665 119383 119383