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Definition
mineral:k-feldspar, quartz, plagioclase, biotite
composition:felsic
mafics: 5
texture: porphyritic with phaeritic groundmass |
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Definition
mineral:plagioclase, k-feldspar, quartz, biotite
composition:felsic
mafics: 20
texture: phaneritic |
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Definition
mineral:k-feldspar, amphibole
composition:felsic
mafics:10
texture: phaneritic |
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Definition
mineral:plagioclase, amphibo,e, biotite
composition:intermediate
mafics: 50
texture: phaneritic |
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Term
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Definition
mineral:pyroexene, plagioclase
composition: mafic
mafics:40
texture:phaneritic |
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Term
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Definition
mineral:olivine, pyroexene
composition:ultramafic
mafics: 100
texture:phaneritic |
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Term
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Definition
comp:felsic
phenocrysts:k-feldspar, quartz, biotite, amphibole
texture: light grey
colour: porphryitic with aphanitic groundmass |
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Term
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Definition
comp: felsic
phenocrysts: na
texture: black
colour: glassy |
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Term
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Definition
comp:felsic
phenocrysts:k-feldspar
texture:medium grey
colour: porphyritic with aphanitic groundmass |
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Term
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Definition
comp:intermediate
phenocrysts:amphibole, plagioclase
texture:medium grey
colour: porphyritic with aphenitic groundmass |
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Term
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Definition
comp: intermed
phenocrysts:pyroexene
texture:med grey (greenish)
colour: lapilli (pyroclastic) |
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Term
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Definition
comp:mafic
phenocrysts: plagioclase, pyroexene
texture:dark grey
colour: porphyritic with aphenitic groundmass |
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Term
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Definition
comp: mafic
phenocrysts:na
texture:medium brown
colour: vesicular |
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Term
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Definition
structure:
minerology: quartz, calcite
texture: gravel sized, rounded, poorly sorted |
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Definition
structure:
minerology: quartz
texture: sandsize, rounded, very well sorted |
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Definition
structure:
minerology: k-feldspar,quartz, hematite
texture: mostly sandsized, subangular, poorly sorted |
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Definition
structure:
minerology: kfeldspar, quartz, rock frags
texture: sand sized, subrounded, moderatley sorted |
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Definition
structure:parallel bedding, plant fossils
minerology: quartz, rock frags
texture: silt sized, well sorted |
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