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Domain for internal stratification DESCRIPTION of RESULT entity
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References
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Jackson, J.A. (ed.) 1997, Glossary of Geology, 4th edn., American
Geological Institute, Virginia, 769p
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Ryburn, R.J., Bond, L.D. & Hazell, M.S. 1995, Guide to OZROX
AGSO's Field Geology Database, AGSO Record 1995/79, Australian
Geological Survey Organisation, Canberra.
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Qualifier 1:
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Qualifier 2:
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Note:
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Attribute |
Code |
Parent |
Category |
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Synonyms |
Description |
Qualifier 1 |
Qualifier 2 |
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internal_stratification |
LAM |
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lamination (within a bed) |
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straticule |
fine stratification less than 1cm thick |
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internal_stratification |
HPL |
LAM |
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horizontal parallel laminae |
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thin bedding that are parallel and without angular junctions |
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internal_stratification |
CLA |
LAM |
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corrugated lamination |
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convolute bedding where lamination is intricately contorted and does
not show regular subparallel orientation of anticlines and synclines |
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internal_stratification |
CMI |
LAM |
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cryptomicrobial |
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algal laminae, stromatolitic lamination |
fine laminae formed by the trapping of grains and lime precipitation
in a microbial mat |
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internal_stratification |
BED |
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bedded |
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layers or beds of varying thickness or character |
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internal_stratification |
CV |
BED |
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convolute bedding |
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contorted bedding |
wavy disorganised and intricately crumpled bedding |
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internal_stratification |
LEN |
BED |
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lenticular bedding |
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form of interbedded mud and cross-laminated sand, in which the ripples
or lenses are discontinuous in both horizontal and vertical |
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internal_stratification |
WB |
BED |
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wavy bedding |
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rolling strata |
bedding with undulating bounding surfaces |
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internal_stratification |
HO |
BED |
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horizontal bedding |
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bedding parallel to horizon |
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internal_stratification |
XST |
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cross stratification |
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arrangement of strata inclined at an angle to the main stratification |
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internal_stratification |
XB |
XST |
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cross-bedded |
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strata thicker than 1 cm inclined at an angle to main bedding |
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internal_stratification |
TXB |
XB |
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trough cross bedding |
crescent type cross bedding |
cross bedding in which lower bounding surfaces are curved surfaces
of erosion |
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internal_stratification |
TXBL |
XB |
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low-angle trough cross bedding |
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trough cross bedding inclined at a low angle to main bedding |
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internal_stratification |
OXB |
XB |
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overturned cross bedding |
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cross bedding that appears reversed due to folding beyond the perpendicular |
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internal_stratification |
PXB |
XB |
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planar cross bedding |
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cross bedding where lower bounding surfaces are planar surfaces of
erosion |
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internal_stratification |
HX |
XB |
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hummocky cross bedding |
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cross bedding where lower bounding surfaces are erosional and commonly
slope at less than 10 degrees |
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internal_stratification |
HXS |
XB |
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herringbone cross bedding |
chevron cross bedding, zigzag cross bedding |
cross bedding that dips in different or opposite directions in alternating
or superimposed beds |
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internal_stratification |
XL |
XST |
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cross lamination |
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cross stratification with cross beds that are less than 1 cm in thickness |
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internal_stratification |
RXL |
XL |
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ripple cross laminae |
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small scale cross lamination formed by migrating current ripples and
typically contains laminae between 0-08 and 0.3 cm |
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internal_stratification |
CLR |
XL |
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climbing ripples |
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cross laminae where the crests of vertically succeeding laminae appear
to be advancing upslope |
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internal_stratification |
GBD |
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graded bedding |
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bedding with gradual and progressive change in particle size |
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internal_stratification |
GR |
GBD |
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normal grading |
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systematic gradation of particle size with coarsest at base and fining
upwards |
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internal_stratification |
RG |
GBD |
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reverse grading |
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systematic gradation of particle size with finest at base and coarsening
upwards |
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internal_stratification |
CTS |
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contorted stratification |
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stratification that is bent or twisted together by considerable folding
or crumpling |
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internal_stratification |
FLS |
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flasers |
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streaky layers of parallel scaly aggregates surrounding lenticular
bodies of granular material |
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internal_stratification |
MAS |
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massive |
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strata appears to be homogenous and lacking internal structures |
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internal_stratification |
UNK |
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unknown |
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internal stratification is unknown |
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