A Geological Classification of Rocks, with descriptive synopses of the species and varieties, comprising the elements of practical geology.

Macculloch, John.

Verlag: London Longman ua, 1821

Beschreibung

(22 x 14 cm). XXXI, 655 S. Moderner Pappband im Stil der Zeit. Einzige Ausgabe. - "Macculloch's 'Geological Classification of Rock.' describes his system of classifying rocks. He divided rocks into two main classes: Primary and Secondary. He subdivided Primary into unstratified (granite) and stratified (mainly gneisses and schists, with some sediments). The secondary included all the younger sediments and a few 'unstratified' rocks, which his descriptions clearly indicate were igneous intrusions, although he did not specify them as such. Macculloch also described in detail the occurrences of basalt lava ('trap'), the remains of the extensive Tertiary basalt lava plateau off the west of Scotland. Although he realized they were analogous in appearance and composition to recent lava flows, he seemed unwilling to commit himself to the view that the 'trap' rocks were true lava flows. He regarded the problem as an obscure one. MaccuIloch's rock classification was based on that of Werner - as a matter of convenience because it was still widely used - but this classification did not imply acceptance of Werner's ideas about the origin of rocks. He omitted Werner's 'transition' group, regarding it as an unjustifiable complication" (DSB). - Vereinzelt minimal gebräunt. Titel mit hinterlegtem Eckabschnitt (ohne Textverlust). Letztes Blatt mit hinterlegtem unteren Randabschnitt (mit minimalem Buchstabenverlust bei den Angaben der Druckerei), sonst sauber und wohlerhalten. - DSB 8, 593; Ward & Carozzi 1446. Bestandsnummer des Verkäufers 113236-01

Bibliografische Details

Titel: A Geological Classification of Rocks, with ...

Verlag: London Longman ua

Erscheinungsdatum: 1821

Einband: Hardcover