Norsk versjon
Occurence 3054 - 303 Kalvsjø
(Object Id: 8639)
(Last updated: 06.11.2006)

County: Viken Municipality: Lunner (3054)
Map 1:50000: Gran (1815-1) Map 1:250000: Hamar
Coordinate system: EU89-UTM Zone 32
East: 587315 m. North: 6685039 m.
Longitude: 10.5794830 Latitude: 60.2925600
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Resource Type: Carbonates Resource Subtype: Limestone

Raw material meaning: Little Importance (reg. 18.02.2015)

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

Era: Paleozoic Period: Ordovician
Genesis: Sedimentary/metamorphic Form: Layer
Main texture: Banded Min. distribution: Massive (>50 % ore minerals)
Main grain size: Medium grained (1-3 mm)
Strike/Dip: Direction:
Stratigraphic classification of host rock
Era: Paleozoic Period: Ordovician
Province: Caledonides
Geotec.unit: Os-Rø Nappe Complex
Tectonic complex:
Igneous complex:
Group: Oslogruppen Formation: Kalvsjøformasjonen

Information(s) in free text format
Free text
Bruddet ligger i enden av en sidevei, rett ved der den gamle riksveien går under jernbanen, Det har vært delt i 2 nivåer på et 80x100meter stort brudd. Bruddet er type lokaliteten for Kalvsjøformasjonen. Kalken er grålig og forholdsvis rein. Den inneholder en del fossiler som koraller og gastropoder. Øvre del av bruddet blir i dag bruk som fyllplass. Det er også blitt endel bebyggelse i nærheten slikt at det er tvilsomt om det er aktuelt med ny drift på dette sted.

Photo(s) from the Deposit area:
Photo no. 1 showing Oversikt over Kalvsjøbruddet øvre del"

From NGU's Reference Archive:
Owen, Alan W. , 1978
The Ordovician and Silurian stratigraphy of Central Hadeland, South Norway.
;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.338;1-23 + ka pages
A lithostratigraphical terminology is applied to the Middle Caradoc to Upper Llandovery succession in Hadeland. There is a marked lateral facies change within the late Caradoc to Mid-Rawtheyan part of the sequence with the dominantly calcareous northern development interdigitating with the thicker, more argillaceous succession of the south. The surface expression of this change is heightened by major strike faults, many of which are high-angle reverse faults.

Owen, Alan W. , 1982
The Upper Odovician of Hadeland.
;ARTIKKEL; EKSKURSJONSGUIDE;Paleontological contributions from the University of Oslo; International Symposium on the Ordovici; No.279;144-147 pages

Owen, Alan W.; Bruton, David L.; Bockelie, J. Fredrik; Bockelie, Tove G. , 1990
The Ordovician succession of the Oslo Region, Norway.
;Norges geologiske undersøkelse;BOK;Special publication; No.4;1-54 pages
The Ordovician successions of the Oslo Region are subdivided in terms of a modern lithostratigraphical scheme. Twenty-nine formations are defined; some of which are subdivided into stratigraphical or geographical members. Type localities (including hypostratotypes) are designated and many illu- strated by measured sections. Provisional correlations with the standard British and the Baltic chronostratigraphical schemes are made but highlight the lack of good bio- stratigraphical controls at several levels. The Tremadoc to Llanvirn litho- stratigraphy shows considerable uniformity over the Oslo Region but the remainder of the Ordovician shows some marked lithofacies contrasts between, and even within, districts.

Sample No. Sample type Miscellanrous
14-05 Bedrock
Sampler: H. Gautneb
Comment: Grålig fossilrik kalk med snå rev strukturer
No. of registrated CaOMgO analyses = 1
No. of registrated oxide analyses = 1
NB! All analyse values are shown at the end of the printout.:

Analyse Results
Deposit Area 3054 - 303 Kalvsjø

Analysis of acid soluble CaO and Mgo
Analyzed values Derived values
Sample No. Sample Type Acid soluble CaO Acid soluble MgO Dolomite Calcite Unsolved
14-05 Bedrock 48.69% .52% 2.38% 85.61% 12.01%

Oxide analyses

( All values are in % )
Sample No. Sample Type SiO2 Al2O3 TiO2 Fe2O3 MnO MgO CaO
14-05 Bedrock 3.66 0.83 0.05 0.72 0.07 1.48 50.37
Sample No. Na2O K2O P2O5 Sum
14-05 -0.10 0.27 0.03 57.00

The fact sheet was created on 27.11.2022

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