Scientific Earth Drilling Information Service - SEDIS
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biogenic structures
BT
sedimentary structures
.
biogenic structures
NT
algal structures
banks
bioherms
bioturbation
carbonate banks
girvanella
lebensspuren
oncolites
stromatactis
stromatolites
thrombolites
RT
bioerosion
coal
ichnofossils
burrows
peat
reefs
biodegradation
biogenic processes
borings
coprolites
fecal pellets
hardground
rhizoliths
termite mounds
tracks
trails