vi CONTENTS—C ontinued

CHAPTER IV—Concluded

General geology—Con.

Ultramafic and related rocks (Trembleur intrusions ?)—Con. Structuralerelations eye EE OO Hixtermalistructuralerelationsees. oaccaens renter oceans Internal'structural'relations...-. << «sino eras ae eae Originfandsmoderofuintrusione. ee. orci eee eee Age and CONTE] ALON.) <10..25 2s corsyass souovsbets cescysecciehny kt bede aitgnls fon sed siedr ee ee EES Pre-Jurassic acidic intrusive (?) rocks..............0. eee c eee e cece rete eees Pakla groups ssc oP EE TE aay ae eae |S ee Distribution esse ee ee Ea ne oe eve a tthologyjeseecipsccns cas eee RE iene ee er Tae NE ee Cea Field occurrences and megascopic description....................-- Petrographic:deseription™.. - accrue seis ee ee eee Volcanic rocks: ..— Stissee sees Be OE ee Sedimentary,-rocks 73. ..c,.s ete eae ee NE Cae os Structural: relations 35a ycen ee er Se as

UN. <a er ery Ce On Pa SCRE renin ese Oc cae eer eer Sein 2 rece yeaa eR

Melanocratic, quartz-free rocks............. 0.00 cece cece eee eee eee Distribution se sspscsaceaix cs ne so eR Soo ee ee PithOlogyecriege vosceec arse Oe teres ea eh er ee ee

Constituent: minerals 3s-a0 a i ee Composition of various rock types......................000-. Description of individual bodies.....................0..0.000 eee Croydon @reekibodyi25.22 = : visit es) eee Kiliyule@reek bodies 22: 2350. sc Gs ce ee Albraham: Creek body. caccs aim ciny caine ac ee Body west of Mount Hlsie.............000.00..00 520.0 e ee eee abUtiZ zi AnakesbOd vias ssnrc cq cece ee as LOT ales e a eae oes eee een Ore oS Goo Acar Secs | eee Beek

Leucocratic, mainly quartz-bearing rocks.....................0.00000.. Disthibutionssnascte ete ake ee Ee Re A SR i TNIth Ol Siyppice nee ews nea he gapearsce td ee VN orcas sc.

Petrographic description.............. So ea) ee Structuralirelations,.2 52s Feed esos Bees ee aes

Age Uslika formation

Inthologyan-eomerecsar ee oe Structural relations