

020 DR. J. W. DAVSOX OX KltHCT TRKKS COXTAIXIXG AXIMAL 



material. Otliers ivmaiiu'd open till the (lei)osition of tlio overlvin,": sMiidstoiie, and 



ist have boon still ahout t'c^r hiirh, when tinally tilled. Thesp are the most 



■ 1 1 I' ii- .1 :»,. : 1. i...ii ... 



mils 



sr nave ueeii sua iHMiui .» n.i "■,-,■•; •■■■- 



productive of aniii-.-.l remains. The no;,ual eharaeter of the deposits in such taller 

 is represented in lig. 1. At the l)ase is a layer of mineral ehareoal rei)resenting 



Fli.'. 1. 



trees 



- c 





Si'ctii'U I't' I'lvrt trie. 

 (n) Con\. (^) C'tialy sliiili'. (. ) (Imy sliulf. (■'! Siuiclslniip. 



(d) Artrillact'ous saiutstijue. (/) Miiiii-nl cliuroial. (;/) Ciii-Ihimik'i'dus 



(' ) T/aiiil siirfaco. 

 hlKisit, with animal runiaiiis. 



(/') 



>aiuls|oin'. tilliiiLr uitfricii' ( 



if trunk. 



the dehris of the tnnik it> 



am 



1 sduictimes containiiiL;- a sandstone cast of the pith. 



Above this is a variable (|uamiiv of niure or less indnratcd sandy nuitler, in layers, 



w 



lich, owinir to presstn'e, arc nt'tin CMUcave above. 



T 



lis IS I) 



lack 



cncd with or<fanic 



matter, and cdntains fiaL;iiicnts uf hiirk mid cominimilcd jilaiits. with occasional leaves 



if (?iiliiiiiih:->. It contains the greater part of the 



of Conhitti'fi or 



Iran'iiiciits o| stems 



animal remains, though a lew of thcsi' occur in the sandstone aliove. This deposit, 



which is the productive l;i\eiot' t 

 fell into the hollow triii 



le se\era 



1 trees, evideiitiv consists of matter which 



iiks or \\,is w.ished in lt\' iviiiis, while 



the t 



rees were still open 



le .surtace o 



f th 



at tl 



continuous deposit of 



ii. Al 

 1 



io\i' this productive lavt.'!' ai 



avers or sometimes a 



llHl, llV Whlrji t 



he trees W(M'e tiiiallv tilled, and whicli coiittiins 



no orixanic remains e\ce[it I'lM-ineuts of drifted plants. Thus the productive portion 



)f each tree is f uind near 



additional sedimen". the o'l 



After the final llllini;' and the deposition of 



^'itMier coiiipressil)ility of tiie inaiter contained in the trees 



