7 18 19 ai | 29 30 31 37 38 50 64 67 93 5. Yanks Peak Formation incomplete stratigraphic section on Mount Kimball. 6. Mineralogical compositions and quartz grain size of rocks from the Midas Formation. 7. Midas Formation stratigraphic section southeast of Black Stuart Mountain. 8. Mineralogy of some rocks from the Waverly Formation. 9. Mineralogical composition of Guyet Formation conglomerate. 10. Mineralogical textures of Guyet Formation conglomerate. 11. Reference section of Guyet Formation. 12. Compositions of diabase from the Cariboo Terrane. 13. The structures of the Cariboo Terrane organized into deformations, series of surfaces, and folds. 14. Table of formations for the Barkerville Terrane. 15. Major element analysis of dioritic rocks from Antler Formation and Snowshoe Group. 16. The structures of the Barkerville Terrane organized into deformations, series of surfaces, and folds. 17. Results of the strain determinations on eleven samples of the Guyet Formation conglomerate. Illustrations Maps (in pocket; scale 1:50 000) 1635A. Geology, Wells, Cariboo Land District, British Columbia 1636A. Geology, Spectacle Lakes, Cariboo Land District, British Columbia 1637A. Geology, Swift River, Cariboo Land District, British Columbia 1638A. Geology, Cariboo Lake, Cariboo Land District, British Columbia Figures 1. Regional maps showing the location of the four 1:50 000 scale maps that accompany this report. 2. A map of the report area that shows the distribution of the four terranes and their bounding faults. 3. A cartoon structural cross-section from southwest to northeast across the map area. 4. Simplified stratigraphy of the four terranes. 5. A time-space diagram of the four terranes. 6. Palinspastic isopach map of the Yankee Belle Formation. 7. Yanks Peak Formation conformably overlying Yankee Belle Formation. 8. Palinspastic isopach map of the Yanks Peak Formation. 9. Trough crossbedding, Vic Sandstone member, Midas Formation. 10. Bedding style, Mural Formation. 11. Screenwork replacement of light coloured chert, chert-carbonate unit, Black Stuart Group. 12. Dolostone breccia, chert-carbonate unit, Black Stuart Group. 13. Chert breccia, chert-carbonate unit, Black Stuart Group. 14. Limestone breccia, probably tectonic, possibly of the Lower Cambrian, at the base of the chert-carbonate unit, Black Stuart Group. 15. Amphipora in the black pelite unit, Black Stuart Group. 16. The bedding style of fine grained sandstone, sandstone unit, Black Stuart Group. 17. Chert, sandstone unit, Black Stuart Group. 18. Calcareous basalt agglomerate, Waverly Formation. 19. Sandy conglomerate, Guyet Formation. 20. Radiolaria in a chert clast, Guyet Formation conglomerate. 21. Greenberry Formation limestone showing normal and inverse grading. 22. Bedding style, Alex Allan Formation, type locality. 23. Wisps of pelite, which may be fossil ripples, black micrite, Alex Allan Formation. 24. Equal area net plots of ductile style fold axes and the poles to cleavage for four structural domains of the Cariboo Terrane. 25. Map of the arbitrary structural domain divisions of the Cariboo Terrane and Slide Mountain Terrane. 26. Chloritoid crystals at angles to the stylolite and white mica foliation in Yanks Peak Formation quartzite. 27. Spaced cleavage in micaceous quartzite, Yankee Belle Formation. 28. Stretched archaeocyathids in Mural Formation limestone. 29. Open and tight folds in Yankee Belle Formation micaceous quartzite.