Core Lithology Abbreviation Definitions

A - E F - L M - R S - Z
a/a - As Above
abnt - Abundant
abv - Above
Alg - Algae (al)
alt - Altered (ing)
amor - Amorphous
Amph - Amphipora
ang - Angular
anhy - Anhydrite (ic)
ank - Ankerite (ic)
app - Appear
apr - Apparent
aprox - Approximate (ly)
aren - Arenaceous
arg - Argillaceous
ark - Arkose (ic)
asph - Asphalt (ic)
AST - Assigned Similar to (no actual sample taken)
apha - Aphantic
bcm - Become (ing)
bd - Bed
bdd - Bedded
bdg - Bedding
Belm - Belemnites
bent - Bentonite (ic)
bf - Buff
biocl - Bioclastic
biot - Biotite
bioturb - Bioturbated
bit - Bituman (inous)
bl - Blue (ish)
blk - Black
blky - Blocky
bnd - Band (ed)
Brac - Brachiopod
brec - Breccia (ted)
bri - Bright
brn - Brown
Bry - Bryozoa
bulb - Bulbous
bur - Burrowed
c - Coarse (ly)
calc - Calcite (areous)
carb - Carbonaceous
cbl - Cobble (64-256 mm)
Ceph - Cephalopod
cg - Conglomerate
chk - Chalk (y)
chlor - Chlorite
cht - Chert
chty - Cherty
cl - Clastic
cln - Clean
clr - Clear
cly - Clay (ey)
cmt - Cement (ed)
com - Common
coq - Coquina
Cor - Coral
crbnt - Carbonate
Crin - Crinoid (al)
crm - Cream
crpxl - Cryptocrystalline
ctc - Contact
deb - Debris
decr - Decrease (ing)
desi - Desiccation
dism - Disseminated
dist het - Disturbed Heterogeneous
dk - Dark (er)
dns - Dense (er)
dol - Dolomite (ic)
dolst - Dolostone
drsy - Drusy
dtrl - Detrital (us)
elg - Elongate
euhed - Euhedral
f - Fine (ly)
fau - Fauna
Fe - Iron-Ferruginous
Fe-mag - Feromagnesian
Fe-st - Ironstone
fenst - Fenestral
fis - Fissile
fl - Fill (ed)
fld - Feldspar (thic)
flk - Flake
flky - Flaky
flor - Fluorescence
flt - Fault (ed)
fltg - Floating
fnt - Faint (ly)
foram - Foraminifera
fos - Fossil (iferous)
fr - Fair
frac - Fracture (ed)
frag - Fragment (al)
fri - Friable
frmwk - Framework
fros - Frosted
g - Good
Gast - Gastropod
gl - Glass (y)
glau - Glauconite (ic)
gn - Green
gr - Grain (ed)
gran - Granular
grd - Grade (ed)
grdg - Grading
grnl - Granule (2-4 mm)
grnt - Granite
gs - Grainstone
gy - Grey
gyp - Gypsum (iferous)
hd - Hard
hfrac - Horizontal Fracture
hf - Horizontal Fracture
hi - High
hrtl - Horizontal
hvy - Heavy
hadj - Hydrocarbon
big - Igneous
imbed - Imbedded
imp - Impression
incl - Included (Dion)
inc - Increase
ind st - Indistinct
intbd - Interbedded
intcl - Intraclast (s)
intfrag - Interfragmental
intgran - Intergranular
intlam - Interlaminated
intr - Intrusion (ive)
intv - Interval
intxl - Intercrystalline
ireg - Irregular
ird - Iridescent
intrsk - Intraskeletal
kao - Kaolin
lam - Laminated
lchd - Leached
len - Lentil (cular)
lign - Lignite (ic)
lith - Lithographic
lmy - Limy
lns - Lens
lrg - Large (er)
ls - Limestone
lse - Loose
lstr - Lustre
lt - Light (er)
m - Medium
mar - Maroon
mas - Massive
mat - Material, matter
md - Mud
mdst - Mudstone
mica - Mica (ceous)
mic - Micro
mic - Micro
mica - Mica (eous)
mky - Milky
mnr - Minor
mnrl - Mineral (ized)
mnut - Minute
mod - Moderate
Mol - Mollusca
mot - Mottled
mrlst - Marlstone
mrly - Marly
mtx - Matrix
musc - Muscovite
n - No, none, non
nod - Nodule
num - Numerous
o - Oil
o - Open
occ - Occasional
od - Odor
ool - Oolite (ic)
op - Opaque
org - Organic
orng - Orange
orth - Orthoclase
Ost - Ostacod
ovgtn - Overgrowth
ox - Oxidized
p - Preliminary (as suffix)
pbl - Pebble (4-64 mm)
pel - Pellet
perm - permeability
pet - Petroleum (iferous)
phos - Phosphate (ic)
pk - Pink
pl - Plant
plag - Plagio
plcy - Pelecypod
plnr - Planar
plty - Platy
por - Porous (sity)
pos - Possible (ility)
p-p - Pin-Point
pp - Pin-Point
ppt - Precipitate
pred - Predominant (ly)
prim - Primary
prob - Probable (ly)
prom - Prominent (ly)
pt - Part (ly)
ptch - Patch (es)
ptg - Parting
ptsl - Paper Thin Shale Lamination
purp - Purple
pyr - Pyrite (ic)(ized)
pyrb - Pyrobitumen
pyrbit - Pyrobitumen
qtz - Quartz
qtzc - Quartzitic
qtzs - Quartzose
ran - Random
rbc - Removed by Client
rd - Round (ed)
repl - Replaced (ing)(ment)
rexl - Recrystalized
RF - Random Fracture
rip - Ripple
rmn - Remains (nant)
rr - Rare
rsns - Resinous
rthy - Earthy
s - Small
S - Sulphur
s - Small
s&p - Salt and Pepper
sa - Salt (y)
sat - Saturated
sb - Sub
sc - Scales
scat - Scattered
sd - Sand (1/16-2 mm)
sdy - Sandy
sec - Secondary
sed - Sediment (ary)
sft - Soft
sh - Shale
shad - Shadow
shy - Shaly
sid - Siderite (ic)
sil - Silica
skel - Skeletal
sks - Slickensided
sl - Slight (ly)
sln - Solution
slt - Silt (y)
sltst - Siltstone
slty - Silty
sm - Smooth
SP - Small Plug (as prefix)
sp - Spot (ted)(ty)
spec - Speck (led)
spl - Sample
srt - Sort (ed)(ing)
ss - Sandstone
ssd - Soft Sediment Deformation
stn - Stain (ed) (ing)
strg - Stringer
Strom - Stromatoporoid
stromlt - Stromatolite
struc - Structure
styl - Stylolite (ic)
suc - Sucrosic
sug - Sugary
sup - Supported
surf - Surface
sz - Size
tab - Tabular
tex - Texture
Tham - Thamnopora
thk - Thick
thn - Thin
thru - Throughout
tr - Trace
trnsl - Translucent
trnsp - Transparent
tt - Tight
tub - Tubular
uncons - Unconsolidated
unident - Unidentifiable
up - Upper
v - Very
var - Variable
vcol - Varicolored
VF - Vertical Fracture
vfrac - Vertical Fracture
vgt - Varigated
vn - Vein
vrtl - Vertical
vug - Vug (gy) (ular)
w - Well
wh - White
wk - Weak
wthrd - Weathered
wtr - Water
wvy - Wavy
wxy - Waxy
wsrt - Well sorted
x - Extra
xbd - Cross-bedded
xbdg - Cross-bedding
xl - Crystal (line)
xlam - Cross-laminated
yel - Yellow
zn - Zone
. - Broken core
/ - With
>10000 - Permeability over 10000mD
<0.01 - Permeability less than 0.01 mD
CC - Cracked Core
DR - Drilled
LC - Lost Core
RU - Rubble
mD - milliDarcy