Description Table

Rock Type Colour (col) Hardness Grain Size Sphericity Roundness Sorting Cement Type Cement Quality Accessories Siltstone Sltst Black blk Friable fri V.Course (1-2mm) v crs Elongate elg Very Angular v ang Poorly Sorted p srt Anhydritic anhyic Unconsolidated uncons Anhydrite anhy Sandstone Sst Brown brn Soft sft Course (.5-1) crs Sub-elongate sb-elg Angular ang Moderatly Sorted mod srt Argillaceous arg Poor p Glauconite glau Chert Cht Grey gy Firm frm Medium (.25-.5) m Sub-spherical sb-sph Sub-angular sb-ang Well Sorted w srt Calcareous calc Moderate mod Gypsum gyp Green/Olive grn/olv Hard hd Fine (.125-.25) f Spherical sph Sub-Rounded sb-rnd Very Well Sorted v w srt Dolomitic dolic Good g Halite hal Pink pk V. hard v hd V.fine (.063-.125) v f Round/Rounded rnd/rndd Gypsiferous gypfs Quartzic qtzc Magnesite magn White/Cream wh/crm Silt (.002-.063) slt Well Rounded w rndd Siliceous sils Pyrite pyr Transparent trnsp Clay/Shale (<.002) cly/sh Pyritic pyric Siderite/Haemetite sid/hem Translucent trnsl Chert (massive) cht Silty slty Rock Type Colour (col) Hardness Texture (text) Characteristics Sed. Structures Accessories Porosity (por) Fossil (fos) Shale Sh Black blk Plastic plstc Amorphous (massive) amor Arenaceous (Sst) aren Banded bndd Mica mica None visible n vis Foraminfera foram Claystone Clyst Brown brn Soft sft Blocky blky Calcareous calc Inclusions incl Chert cht Pin-point p-p Gastropod gast Marl Mrl Grey gy Firm frm Earthy rthy Carboniferous carbf Laminations lams Feldspar fld Intercrystalline intxln Mollusc mol Mudstone Mdst Blue bl Hard hd Fissile (splits) fis Fossiliferous foss Micro-laminations mic-lams Lignite lig Fractured fracd Oolite/ic oo/ool Green/Olive grn/olv Brittle brit Papery ppry Micaceous mics Siderite/Haemetite sid/hem Ostracode ost Orange orng Compaction (comp): Platey (mica) plty Pyritic pyric Pyrite pyr Algae alg Pellets pels Purple purp Poor/ly p/ply Smooth sm Sandy sndy Olivine olvn Bioturbation bioturb Shell shl Red rd Moderate mod Splintery (Fibrous) splty Silty slty Sulphur sulp Bryozoa bry Sponge spg Yellow yel Well w Waxy wxy Sulphurous sulprs Quartz qtz Echinoid ech Trilobite tril Rock Type Colour (col) Hardness Texture (text) Durhams Classification Crystal Shape Crystal Size Accessories Limestone Lst Black blk Friable fri Amorphous (massive) amor Mudstone mdst Euhedral (full form) euhed V.Course (1-2mm) v crs Anhydrite anhy > Limestone: Violent fizz, frothy, floats to surface. Dolomite Dol Brown brn Soft sft Chalky chky Wackestone wkst Sub-euhedral sb-euhed Course (.5-1) crs Glauconite glau Chalk Chk Grey gy Firm frm Earthy rthy Packstone pkst Anhedral (no form) anhed Medium (.25-.5) m Gypsum gyp > Dolomitic LSt: Brisk, quiet fizz, continuous CO 2 release, Green grn Hard hd Stylolitic (teeth & socket) Grainstone grnst Fibrous fib Fine (.125-.25) f Halite hal moves about on bottom. Pink pk Brittle brit stylic Boundstone bndst V.fine (.063-.125) v f Magnesite magn > Calcitic Dolomite: Mild CO 2 emission, rocks up and down White/Cream wh/crm Sucrosic (sugary) suc Micro (.004-.063) mic Pyrite pyr in one place. Transparent trnsp Vitreous (glassy) vit Micritic (grains) mictc Crypto (<.004) crp Siderite/Haemetite sid/hem > Dolomite: No fizz, slow CO 2 beads form, reaction slowly Translucent trnsl Waxy wxy Calcitic (crystaline) calctc Silceous sils reaction slowly accelerates until thin stream. Rock Type Colour (col) Hardness Texture (text) Lustre (lstr) Characteristics Fracture (fract) Anthracite Anth Black blk Soft sft Blocky (hard) blky Dull dl Argillaceous arg Conchoidal concdl Amount Type Coal Coal Brown brn Firm frm Peaty (soft) peaty Earthy rthy Bitumous bitus Cleating cltng Common (>20%) com None n Lignite Lig Light lt Hard hd Woody wdy Shiny shny Pyritic pyric Angular ang Abundant (15-20%) abt Spotty spty Peat peat Pale pa Brittle brit Silky (pearly) slky Sandy/Silty sndy/slty Even/uneven evn/unevn Mod. Abundant (10-15) Steaky str Dusky dsky Viteous (glassy) vit Sooty sooty Hackly (jagged) hkly mod abt Patchy ptchy Dark dk Waxy wxy Sub-conchdl sb-chncdl Minor (5-10%) mnr Uniform unif Rare (1-5%) rr Rock Type Colour (col) Hardness Texture (text) Lustre (lstr) Crystal Shape Fracture (fract) Trace (<1%) tr Anhydrite Anhy White/Cream wh/crm Soft sft Amorphous (massive) amor Dull dl Euhedral euhed Conchoidal concdl Colour Intensity Gypsum Gyp Grey gy Firm frm Fibrous fib Earthy rthy Sub-euhedral sb-euhed Splintery splty Brown brn Dull dl Halite Hal Pink pk Hard hd Fissile (crumbles) fis Shiny shny Anhedral anhed Sub-conchdl sb-chncdl Orange orng Bright bri Sylvite Syl Yellow yel Brittle brit Granular gran Silky (pearly) slky Fibrous fib Uneven unevn Yellow yel Blue bl Viteous (glassy) vit White wh Transparent transp Blue bl Amount (amt) Type Colour (col) Amount (amt) Intensity Colour (col) Rate Type Intensity Colour (col) None N/S Spotty spty Black blk None n Dull dl Brown/Red brn/rd Instantaneous inst Blooming bloom Dull dl Brown/Red brn/rd Rare rr Streaky str Brown brn Rare rr Bright bri Orange orng Fast fast Streaming stmg Bright bri Orange orng Common com Patchy ptchy Common com Yellow yel Moderate mo Yellow yel Abundant abt Uniform unif Abundant abt White wh Slow slw White wh Blue bl Black/Brown blk/brn Blue bl As Above aa Clast clst Decrease/ing decr/decrg General gen High hi Laminated lamd Matrix mtx Part pt Styolite (clay layer) sty Variable vari Appear/ance app/appnc Coated ctd Faint fnt Grade/ing grd/grdg Inclusion/s incl/incls Large/Thick lrg/thk Occasional occ Predominant pred Speck spk Vein vn Approximimate aprox Cross-bedded xbdd Fill/ed/ing fll/flld/fllng Grain/s gn/gns Increase/ed/ing incr/incrd/incrg Layer/ed lyr/lyrd Oil o Sample/s smpl/smpls Sticky stky Visible vis Band/ed bnd/dndd Crystaline xln Fragment frag Globular glob Irregular ireg Mineral mnrl Organic/Plant org/pl Slight/ly sl/slly Stringer strg With w/ Flourescence (UV light) HCl Chemical Test SILICEOUS ARGILLACEOUS CARBONATES CARBONACEOUS XTRA Cut (propanol & under UV light) Residue Colour (natural light) EVAPORITES HC SHOWS Oil Staining (natural light) Flourescence (flor)

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Description Table