iv CONTENTS—Continued CHAPTER IV—Continued General geology—Con. Tenakihi group—Con. Sirau graphy, and sthickn esteem ees eee icra eae ere tere a BY=\ R24 (-%6 If-"2101 010) 1\: arrears ree Ia omer Te eee RS ea ee BGTC oo Or Generalized section in the Tenakihi Range.................... Generalized section in the Ingenika Range...................- Metamorphism ised 5 se esers cca es a iis wtaene tree Oia asia eee Ole Rea ee Sequence of metamorphic changes.................-.eeeceeeeceeee QUA te FV OLS oz tts sees sess scp saeco cE eS nce Relation of metamorphism to stratigraphy and structure............ Orr Ginn ite cis cece ste agane s aee iAcé-and- correlation wit cin ciee aie eee ee eee Ingenikiasproupessrc.ccscot eye e ercer a eine ale ees oe Ee eee Name and distribution cc cencc cc Gaerne Oe eine Tih ology sieeve esaierss os Sai a OER eo en eee Megascopicidescription: sear creat ee ee etre eee Rocks in the southern part of Tenakihi Range................. Rocks northeast of Tenakihi Creek................00000000 een Rocks in the northern part of Tenakihi Range................. Rocks in Mesilinka River Valley...............202...0ce0000. Rocks between Blackpine Lake and Chase Mountain........... Rocks east and south of Mount Lay....................-++-.- Rocks in upper Swannell River Valley....................20. Rocks in the northern third of the map-area................... Petrographic description and chemical composition.................- General statement: ......5 scree peed Since ne Conglomerates. 5 x sic Meee cance Corerore eee Quartalitess stein aan ee eee eee aa ee Sections south of Ingenika River..................0000000000. Sections north of Ingenika River....................e00---0-. iixternalistructuralmela tions es ere ais eee ee See Meta orp busral eee een neers RT Be nO on hee EG Cs Secweron 2s SRE oe 2) BUREN ees DVS Ro a Int-par-lit gneiss........... Silicated marble and skarn............................ AMDBIDON Min cccet 4c tween eee asleoas o teaee) Age Le Glimmerite ae) terse oe ee ey ad Daeg at nea Pyrrhotite skarn Granodiorite Weucopranite: scatters) yee eae es Alaslcite ii ae asec rye 05 ae ep ee ae ake ot eee eEE