0-4%

4-8%

S=12%

12-16%

16-20%

>20%

Figure 57. Averaged equal area net plots of the poles to joints in the Antler Formation, where
A, B and C are from structural domains 1S, 2S and 3S (Fig. 25) and have 59, 135 and 151 points

respectively.

ROCKS OF THE QUESNEL TERRANE

The Quesnel Terrane (Quesnellia) consists of Triassic and
Jurassic pelitic and volcanic rock lying west of the Slide
Mountain (Crooked Amphibolite) and Barkerville ter-
ranes. The boundary with the Slide Mountain Terrane
may be depositional, unlike the faults that bound other
terranes. Quesnellia extends north and south beyond the
limits of the map area (Tipper, 1984). Although it over-
lies the Crooked Amphibolite it is not known to overlie
the Antler Formation.

78

Stratified rocks

Quesnellia consists of 2 sequences within the map area,
older black phyllite and younger mafic volcaniclastics.

Black phyllite

The black phyllite sequence consists of black pelite, sil-
tite, limestone and conglomerate. The pelite is commonly
slate or phyllite and may be locally siliceous imposing the
character of argillite. The presence of 2 to 40 cm lime-