Integrative Levels Classification project ILC2 schedules developing schedules how it works people references
ILC class i

ILC developing version
Expanded class i

   ▲  broader class

▽ ⌕         i  rocks; stones  [geology; planetary geology]  ← gssu solid-in-solid suspensions   ≈ DDC 550
▽ ⌕         i1       in era; period  [geochronology; stratigraphy]  ← cbx tens of billions years
▽ ⌕         i1X            geological eras
▽ ⌕         i1d            Hadean; 4550-4000 Ma
▽ ⌕         i1h            Eoarchean; 4000-3600 Ma
▽ ⌕         i1i            Paleoarchean; 3600-3200 Ma
▽ ⌕         i1j            Mesoarchean; 3200-2800 Ma
▽ ⌕         i1k            Neoarchean; 2800-2500 Ma
▽ ⌕         i1l            Paleoproterozoic; 2500-1600 Ma
▽ ⌕         i1m            Mesoproterozoic; 1600-1000 Ma
▽ ⌕         i1n            Neoproterozoic; 1000-540 Ma
▽ ⌕         i1p            Palaeozoic; 542-251 Ma
▽ ⌕         i1s            Mesozoic; 250-65 Ma
▽ ⌕         i1t            Tertiary; 65-1.7 Ma
▽ ⌕         i1u            Quaternary; 1.7-0.01 Ma
▽ ⌕         i31   [hU7]           from structural layer
▽ ⌕         i4       earthquakes; quakes; tremors; temblors  [seismology; seismic]  ← it tectonic plates
▽ ⌕         i49             earthquake waves
▽ ⌕         i4X   [an8]           Richter magnitude
▽ ⌕         i4p            microearthquakes; Richter 1.0-1.9; Mercalli I
▽ ⌕         i4q            minor earthquakes; Richter 2.0-2.9; Mercalli I-II
▽ ⌕         i4r            minor eathquakes; Richter 3.0-3.9; Mercalli III-IV
▽ ⌕         i4s            light earhquakes; Richter 4.0-4.9; Mercalli IV-VI
▽ ⌕         i4t            moderate earthquakes; Richter 5.0-5.9; Mercalli VI-VII
▽ ⌕         i4u            strong earthquakes; Richter 6.0-6.9; Mercalli VIII-X
▽ ⌕         i4v            major earthquakes; Richter 7.0-7.9; Mercalli X
▽ ⌕         i4w            great earthquakes; RIchter 8.0-8.9
▽ ⌕         i4x            great earthquakes; Richter 9.0-
▽ ⌕         i5        geologic process
▽ ⌕         i52   [an]            radioactivity
▽ ⌕         i5c            volcanism; volcanic activity  [volcanology]
▽ ⌕         i5k            magmatism; magma or lava solidification; freezing  ← ig magma
▽ ⌕         i5m            metamorphism
▽ ⌕         i5n            sedimentation; deposition
▽ ⌕         i5t            tectonic process
▽ ⌕         i68   [g6]            colour
▽ ⌕         i69             fracture
▽ ⌕         i7        grain size; particle size
▽ ⌕         i77   [e]            chemical element  [petrologic analysis]
▽ ⌕         i79             texture; microstructure
▽ ⌕         i7b            large boulders
▽ ⌕         i7c            boulders
▽ ⌕         i7d            cobbles
▽ ⌕         i7f            coarse gravel
▽ ⌕         i7g            medium gravel
▽ ⌕         i7i            fine gravel
▽ ⌕         i7l            coarse sand
▽ ⌕         i7m            medium sand
▽ ⌕         i7n            fine sand
▽ ⌕         i7r            coarse silt
▽ ⌕         i7s            medium silt
▽ ⌕         i7t            fine silt
▽ ⌕         i7y            clay
▽ ⌕         i84   [an]            tenacity
▽ ⌕         i9        special quality
▽ ⌕         i91   [i1]           formed in era
▽ ⌕         i92   [jU]           of region
▽ ⌕         i97   [gt]           containing mineral
▽ ⌕         ig       magma  ← i5cem magmatic eruption
▽ ⌕         igl            lava
▽ ⌕         igt            tephra
▽ ⌕         ii       single rocks  [petrology; petrography; lithology]  ≈ DDC 552
▽ ⌕         ii9             alkali-silica content
▽ ⌕         iib            quartzolites
▽ ⌕         iic            granites  ✍
▽ ⌕         iid            diorites
▽ ⌕         iie            gabbros
▽ ⌕         iif            peridotites
▽ ⌕         iig            hypabyssal rocks; subvolcanic rocks
▽ ⌕         iih            rhyolites
▽ ⌕         iii            trachytes
▽ ⌕         iij            basalts
▽ ⌕         iik            pumices; pumicites
▽ ⌕         iil            pyroclastic rocks; pyroclastics
▽ ⌕         iim            gneisses
▽ ⌕         iin            marbles
▽ ⌕         iio            green schists
▽ ⌕         iip            blue schists
▽ ⌕         iiq            conglomerates
▽ ⌕         iir            sandstones; arenites including wackes  ✍
▽ ⌕         iis            mudrocks; lutites; shales
▽ ⌕         iit            limestones  ✍
▽ ⌕         iiu            dolostones; dolomite rocks
▽ ⌕         iiv            coal
▽ ⌕         iiw            oolitic limestones
▽ ⌕         iix            evaporite rocks
▽ ⌕         ik       rock beds
▽ ⌕         ikb            parallel beds
▽ ⌕         ikc            cross beds
▽ ⌕         ikg            graded beds
▽ ⌕         il       rock members
▽ ⌕         im       rock formations; geological formations  [regional geology (partim)]
▽ ⌕         imb            plutons  ← ii single rocks
▽ ⌕         imv            ophiolites
▽ ⌕         imy            flysches  ← iip blue schists
▽ ⌕         io       rock subgroups
▽ ⌕         ip       rock groups  [regional geology (partim); structural geology]
▽ ⌕         ipc            coastal plains
▽ ⌕         iph            horizontal layers
▽ ⌕         ipm            domes; basins
▽ ⌕         ipo            folds
▽ ⌕         ipq            faulted blocks
▽ ⌕         ipr            homogeneous crystalline masses
▽ ⌕         ipt            layered metamorphic rocks
▽ ⌕         ipx            complex structures
▽ ⌕         iq       rock supergroups
▽ ⌕         is       crust structural zones
▽ ⌕         isc            cratons
▽ ⌕         isf            rift valleys
▽ ⌕         isg            oceanic ridges; mid-ocean ridges
▽ ⌕         iso            oceanic plates
▽ ⌕         iss            subduction zones; ocean deeps
▽ ⌕         it       tectonic plates  [plate tectonics]  ← hUal 
▽ ⌕         itt            plates of the Earth  ← hU the Earth
 
Connected classes:
 
 18  [i1]      in age; geological era
 i4      earthquakes; quakes; tremors; temblors  [seismology; seismic]  ← it 
 i5k           magmatism; magma or lava solidification; freezing  ← ig 
 i91  [i1]           formed in era
 ig      magma  ← i5cem 
 imb           plutons  ← ii 
 imy           flysches  ← iip 
 j landforms; regions; geographical features  [physical geography; topography; geomorphology]  ← i 
 j13  [i1]           formed in era
 jd      mountains; hills; ridges; ranges  [orography]  ← isax 
 jdc           volcanic mountains  ← iac 
 jji           rift valleys  ← it 
 jwo           volcanic islands  ← iac 
 m91  [i1]           lived in; existed in era  [palaeontology]
 n13  [i1]           appeared; originated in period
 r2c           quarry  ← i 
 r2d           mine; pit  ← i 
 r3f           lithic technology; Stone Age  ← ii vdb 
 r5a           mining; quarrying; extraction  [mining engineering]  ← i 
 rb      ores; mineral products  ← i 
 rbe           ceramic  ← iip 
 w1      in historical period; calendar time; epoch  ← i1uh bbxprsvxw 
 wrn           naturalism  ← g h i j k l m 
 ygk           geology; petrography  ← i 

specificity 
current: 3 

   
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ILC developing version — ISKO Italia <https://www.iskoi.org/ilc/> : 2006.03.06 - 2026.05.14 -