The Complete Work of Charles Darwin Online

RECORD: Darwin, C. R. n.d. Abstract of Rose, Sur les roches qu'on nomme grunstein et grunstein porphyrique. CUL-DAR40.43. Edited by John van Wyhe (The Complete Work of Charles Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 12.2021. RN1

NOTE: See record in the Darwin Online manuscript catalogue, enter its Identifier here. Reproduced with permission of the Syndics of Cambridge University Library and William Huxley Darwin.

[43]

Annales des Mines 3d series vol 8

M. G. Rose on Grunstein

Porphyres dioritique, couteau albite & amphibole

(from Fernando in Chile

Porphyres Amphilique couteau

(a) Labrador & augite –

Labrador & Albite — how to distinguish

N.B Labrador, hard to distinguish from Albite, latter however clearly at 93° & in this rock, crystal of feldspar

(a) are placed lengthways & parallel, just like in Cordillera — rocks

[Labradorite] at 88° or 134°

Dolerite in Labrador & Augite

M. G. Rose. 1835. Sur les roches qu'on nomme grunstein et grunstein porphyrique. Annales des Mines 3d ser. 8: 5-32.

Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)