Rapakivi granite is a hornblende-biotite granite containing large round crystals of orthoclase each with a rim of oligoclase (a variety of plagioclase)...
10 KB (1,074 words) - 07:16, 27 April 2024
type of granite Orbicular granite Quartz monzonite – Type of igneous rock Rapakivi granite – Type of igneous rock Subsolvus – Two feldspar granite Geology...
56 KB (6,574 words) - 11:39, 1 August 2024
occurrences at Vaasa, on the west coast of Finland. Bohus granite Jotnian Rapakivi granite Satakunta dyke swarms Öhman, T.; Preeden, U. (2013). "Shock...
903 bytes (75 words) - 12:18, 2 January 2021
at the contact. At depth they exhibit a coarse-grained rapakivi texture. The subvolcanic granites are the most widespread igneous rocks and were thought...
14 KB (1,393 words) - 07:23, 8 December 2023
analogue considered to theoretically represent the Earth's upper mantle Rapakivi granite – Type of igneous rock Rhomb porphyry – Textural form of igneous rock...
14 KB (2,208 words) - 23:33, 16 April 2024
quartz, epidote, and calcite in veins in granite at Arendal in Norway. The distinctive texture of rapakivi granite is due to oligoclase rims on orthoclase...
5 KB (496 words) - 13:17, 11 May 2024
studied the Alnö Complex, Norra Kärr Alkaline Complex and various Rapakivi granites. In a 1948 publication on Alnö, von Eckermann correctly claimed a...
2 KB (171 words) - 22:38, 12 January 2023
often occurs in association with norite, anorthosite, charnockite and rapakivi granite in Proterozoic metamorphic belts. It is characterised by the presence...
1 KB (102 words) - 14:13, 27 July 2023
emplaced during the Svecokarelian orogeny. Following this last orogeny rapakivi granites intruded various locations of Finland during the Mesoproterozoic and...
36 KB (3,604 words) - 09:01, 14 July 2024
Mineralogical Magazine. 70 (2): 238–239. Kristallin.de: Orbicular rocks vs. Rapakivis Aguirre, Luis L.; Hervé, Francisco A.; Campo, Mónica del (September 1976)...
10 KB (1,040 words) - 03:30, 16 August 2023