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Hummeln impact structure, Kalmar County, Swedeni
Regional Level Types
Hummeln impact structureImpact Structure
Kalmar CountyCounty
SwedenCountry

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PhotosMapsSearch
02736040017272437521270.jpg
Polymict impact breccia

Hummeln impact structure, Kalmar County, Sweden
06660440017272437557527.jpg
Polymict impact breccia

Hummeln impact structure, Kalmar County, Sweden
09083040017272437607892.jpg
Monomict impact breccia, etc.

Hummeln impact structure, Kalmar County, Sweden
02736040017272437521270.jpg
Polymict impact breccia

Hummeln impact structure, Kalmar County, Sweden
06660440017272437557527.jpg
Polymict impact breccia

Hummeln impact structure, Kalmar County, Sweden
09083040017272437607892.jpg
Monomict impact breccia, etc.

Hummeln impact structure, Kalmar County, Sweden
02736040017272437521270.jpg
Polymict impact breccia

Hummeln impact structure, Kalmar County, Sweden
06660440017272437557527.jpg
Polymict impact breccia

Hummeln impact structure, Kalmar County, Sweden
Latitude & Longitude (WGS84):
57° 22' 1'' North , 16° 15' 0'' East
Latitude & Longitude (decimal):
57.36700,16.25000
GRN:
N39E07
Type:
Impact Structure
Köppen climate type:
Cfb : Temperate oceanic climate
Mindat Locality ID:
439829
Long-form identifier:
mindat:1:2:439829:8
GUID (UUID V4):
0


The Hummeln impact structure is beneath Lake Hummeln and the 1.78 Ga granite and gabbro/diorite target rock basement depression is filled with Cambrian and Ordovician sedimentary rocks. The impactor hit a shallow (25-75m) sea with up to about 130 m of sedimentary rock overlying the granite - these have since been eroded away exposing the granite. The structure is only 1.2 km across and is about 464 to 468 Ma. A monomictic clast-supported in-situ breccia is exposed on the shore just SE of the depression and matrix-supported polymictic lithic breccia is also known. Suevite impact breccia occurs in on-shore dikes and in boulders (Holm-Alwmark, 2021).

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Standard Detailed Gallery Strunz Chemical Elements

Mineral List


1 valid mineral.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

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Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Calcite
Formula: CaCO3
Habit: rhombohedral, scalenohedral
Colour: pale yellow
Description: Matrix cementing breccia fragments, small voids are lined with calcite crystals.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3

List of minerals for each chemical element

CCarbon
Cⓘ CalciteCaCO3
OOxygen
Oⓘ CalciteCaCO3
CaCalcium
Caⓘ CalciteCaCO3

Other Regions, Features and Areas containing this locality

Eurasian Plate
EuropeContinent

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Holm-Alwmark, Sanna. (2021) Impact cratering record of Sweden - A review, in Reimold, W. U., and Koeberl, C., eds., Large Meteorite Impacts and Planetary Evolution VI: Geological Society of America Special Paper 550, p. 1-39, https://doi.org/10.1130/2021.2550(01)
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