138 SUCCESSION 



ing classification of successions is proposed, based upon the 

 plan outlined above. The termination -ium {-aav) has been 

 used throughout in the construction of names for suc- 

 cessions, largely for reasons of euphony. If it should be- 

 come desirable to distinguish the names of formations and 

 successions by the termination, the locative sufiBx -on{-<ov) 

 should be used for the latter. The terms given below would 

 then be hyps&n, rJiyson, hedon, sphyron, prochoson, pnoon, 

 pagon, tribon, cluswi, repon, olisthon, xerasion, theron, broton, 

 pyron, ecballon, camnon, ocheton, ardon. 



I. Normal successions: cyriodochae {Kvpun, regular, &oxn, 7> 

 succession) 



a. Primary successions : protodochae {wpdro^, first, pri- 

 mary) 



1. By elevation: hypsium (vi/fos, t6, height, elevation, 



-ttov, place) 



2. By volcanic action: rhysium {pva-k, ^, flowing, es- 



pecially of fire) 



3. In residuary soils: hedium (eSos, to, a sitting, base) 



4. In colluvial soils : sphyrium {<7<l>vpov, t6, ankle, talus) 



5. In alluvial soils : prochosium (7rpdx<uo-w, ^, a deposition 



of mud) 



6. In aeolian soils : pnoium (irvo^, ^, blowing, blast) 



7. In glacial soils : pagium (irayos, o, that which becomes 



solid, i. e., a glacier) 



b. Secondary successions : hepodochae (hro), to follow) 



8. In eroded soils : tribium {rpCPio, wear or rub away) 



9. In flooded soils : clusium (icA.i5o-ts, 6, a drenching, flood- 



ing) 



10. By subsidence: repium (peTru, incline downwards, 



sink) 



11. In landslips : olisthium (dXurdo;, 6, slip) 



12. In drained and dried out soils : xerasium (^pao-iii, ij, 



drought) 



13. By animal agencies : therium (flijp, 6, wild animal) 



14. By human agency : brotium (ySpord?, 5, a mortal) 



a. Burns : pyrium {nvp, to, fire) 



b. Lumbering: ecballium (ck/JoXXw, cut down forests) 



