Subsurface Laboratory Methods 



255 



Halloysite. Endellite, Allophane 



Degrees Centigrode 

 'pp. , .30°. . . 5 00 700 900 nOO 



r I ' I ' I ' I ' I ' I ' I ' I ' I ' 1 



Ui«g«, Btlgium |\/f 



Tinfie.Utoh \^^ 1 1— -J ^ \^ 1 I I 



Gol«na, Konsos [■v./|' 



Outens, 

 Kentucky ^"xA ' 



Bfdford, Indiono 



Bedford, Indiono I 



Missouri k I 



Styrio I ( 



1 — r 



-I \r- 



J L 



MINERAL, 

 I HoUoysite 



I Holloyslte 

 I Holloysite 



J- 1 '\\ I Holloysite 



x 



Holloy site 



ond Gibbsite 



Endellite 



I I Alloptione 



I I I 1^1 Aiiophone 



I .■ I ■ .I,' I I I I I . I . I . I ■ I . I 

 30 500 500 ^ht 560 — lie 



Degrees Centigrade 



100 



100 



Figure 106. Thermal curves of halloysite mixed with some gibbsite, endellite, and 



allophane. 



