Leucite-tephrite,
Niederrotweil |
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Tephrite |
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basic volcanic
rock, with a vitreous groundmass;
most frequent rock in the Kaiserstuhl volcanic complex;
Häufigstes Gestein im Kaiserstuhl
main constitutes: plagioclase, leucite, Ti-augite
accessory: K-feldspar, analcime, magnetite, apatite zircon, melanite
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thin
section under plane polarized light
image width 3,7 mm
vitreous matrix |
thin
section under crossed polarized light
image width 3,7 mm
twinned Ti-augite, with nice zoning and sandglass structure
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Essexite,
Schelingen |
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basic subvolcanite
from the central Kaiserstuhl.
main constitutes: plagioclase, Ti-augite
accessory: K-feldspar, magnetite, apatite, zircon |
thin
section under plane polarized light
image width 3,7 mm |
thin
section under crossed polarized light
image width 3,7 mm
Ti-augite with oszillation zonation,
plagioclase, magnetite |
Limburgite,
Limberg, Sasbach |
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primitive igneous
rock with vitreous groundmass and mafic phenocrysts,
vesicles are filled with zeolites (faujasite, phillipsite,..) and other
secondyra minerals
main constitutes:
Ti-augite, olivine,
accessory: magnetite, ilmenite
secondary minerals: calcite, aragonite, zeolites |
thin
section under plane polarized light
image width 3,7 mm
augite phenocryst in vitreous matrix (stilpnomelane)
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thin
section under crossed polarized light
image width 3,7 mm
Ti-augite with oszillation zonation,
plagioclase, magnetit |
Soevite
(carbonatite) Orberg, Schelingen |
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volcanic limestone
from the central Kaiserstuhl
main constitutes: calcite
accessory: magnetite, olivine, apatite, phlogopite,
koppite |
thin
section under plane polarized light
image width 3,7 mm
koppiet: brown mineral beside isotrop magnetite
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thin
section under crossed polarized light
image width 3,7 mm |
Carbonatite-lapilli,
Henkenberg,
Niederrotweil |
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extrusive
carbonatitic lapilli stone
main constitutes: calcite
accessory: apatite |
thin
section under plane polarized light
image width 3,7 mm |
thin
section under crossed polarized light
image width 3,7 mm |
Faujasite
(zeolite), Limberg, Sasbach
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faujasite with offreite and phillipsite
image width 10 mm |
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