Whitesail Lake Map-Area

A section across part of the upper volcanic sequence exposed west
of Newcombe Lake illustrates the fragmental nature of the group and to
some extent the thickness of individual members.

Thickness
Description (feet)
Top of section
SVIMESONS ARON, HUGE on coat snnscaessoocoocons:caesororoouoncautlovoccsesibesoeusdenecsasssns 1.0
BandedaGZato2))esoftemaroonetutheee eee eee 7.0
Massive coarse breccia, fragments to walnut size .................... 35.0
skeveraleal G3” (i) D7) TAETROLONL {HWE g2.anncvacacooososs soso vonaconececeeeevoctaseuse sore 15.0
Medium-grainedsmaroone tin, eae a nee eee ene 25.0
Rhyolite breccia; cc tes eneei ae ee ee in ee 2.0
Maroonstowgreyabanded attittmeteee eee ctenat eae 2.0
Gaps, SiGe ot een an ate ren tnen Cth ers eens ted ee en 50.0
(COBISS ISL WRSCOTA oo. secccoccseanssooososevsceceasavcabosentnesniecetoc.ucceransecononveces 250.0
Massive grey breccia, fragments to walnut size ........................ 50.0
Reddish rey git th gocera a seal cet estaretnae' fe es lene erence 3.0
REdg and esitic itl © w/eeee eee er ene ene nen eee 5.0
Dense, fine-grained, red-grey breccia 0.0.0 occ P25)
LPNS AON {AYER cccoscocosoccocesoseovasubacdertneoontdecsiostanese tpecopecces cece 8.0
Pink tuff with 1-inch laminations .020.00.0.000000cccccceeceeeccc 3.0
IRC! NOMA ATNTS TOG occoscoconosnacrescoscococosoncsacvuvebuccusontuebroresecthctiscctece 6.0
ReGi Srey. tut eryec ra iene ectee tiers fete tei ees ee 3.0
Redituites ratomt laminations) mee eet een 2.0
Red: andesite :fow: crs aaut cig) eee en ke an Sey one ape 4.0
Greyrred: tutti sie Aart errant geen eae 228)
Elandigdcnse chy olitich tu tigress eae enn gee 3.5
lard: siliceoussmed) tutes) setae ener ete eet een 2.0
Hardlsiliceoustred:tuftes sce etree et ee 2
Bing MalOOntutk: cre. ten ak ee teren einen ann eae eee 2S)
Hard@siliceous ered tutigee 10 eee a cote tn ee DSS
Hardgsiliceoust ore yatutian: ere senenne = oe ne men nee ones US
Grey-green weathering, breccia fragments up to 2 inches
Dy. SLC Digg see tee Cee emi aa oy tr aS 100.00

Bottom of section

ee een ng

Sedimentary rocks of the Hazelton group include fine-grained, dark
argillite, greywacke, thin-bedded, grey-green chert, and minor conglomerate
and impure limestone. The argillites, though commonly black, may be
limonite brown or rarely green, and occur in beds from 1 inch to 15 feet thick.
Greywackes are common and are composed largely of tuffaceous material,
that probably came from the erosion of older tuffs but may include some
original pyroclastic material deposited in the basin of sedimentation. The
greywackes are commonly grey-green but may be maroon, red, or brown.

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