Norsk versjon
Occurence 301 - 606 Grinda
(Object Id: 15451)
(Last updated: 16.02.2010)

County: Oslo Municipality: Oslo (301)
Map 1:50000: Oslo (1914-4) Map 1:250000: Oslo
Coordinate system: EU89-UTM Zone 32
East: 597840 m. North: 6649349 m.
Longitude: 10.7526490 Latitude: 59.9698570
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Resource Type: Granite and other igneous rocks Resource Subtype: Syenite
Brickstone(Y/N): N
Raw material meaning: Little Importance (reg. 18.02.2015)
Historical: Yes , (Confirmed 24.sep.2004 by Leif Furuhaug)

Resources and production
Activity: Stone quarrying Reserves:
Operating method: Open pit mining Historical production:

Deposit rock
Lithology: Weathering colour:
Genesis: Form:
Main texture:
Main grain size: Main alteration:
Strike/Dip: Direction:
Stratigraphic classification of host rock
Era: Period:
Tectonic complex:
Igneous complex:
Group: Formation:

Information(s) in free text format
Bruddet er ganske lite, 10 m x 10 m med 1-2 m avsenkning. Syenitten er ganske skarp rød og har feltspatkrystaller på ca. 1 cm. Store inneslutninger av hornfels og RP i dette området.
Grinda ligger mellom Sognsvann og Maridalsvann, i sørenden av Oslomarka.

Photo(s) from the Deposit area:
Photo no. 1 showing Bruddet"

From NGU's Reference Archive:
Oxaal, John , 1916
Norsk granit
;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.76;1-220 pages
This work is a report of granite and the granite industry in Norway. It contains a description of the various fields of granite and similar rocks from a scientific as well as from a technical and economical standpoint. The geological occurrence of the various rocks, their chemical and mineralogical composition, are thoruoughlyoughly treated, also the questions of practical interest, as the quality and other technical properties, further the problems of location and conditions for transport, conditions for quarrying and otherquestions of interest in the utilization of the various occurrences of granite. Granite: This chapter consideres first the mineralogical and chemical composition of the granite, and the various types of granite resulting from the varying composition; thereafter the most important structural types and how these are dependent on the geological appearance of the rock. Lakkolites and other froms assumed by granite masses when injected into the crust of the earth, are mentioned; some examples of beautifully formed lakkolites are also mentioned. The question of sheet structure and rift in the granite are of great importance in its utilization, and are of interest both practically and theoretically.

The fact sheet was created on 08.12.2021

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