The Geology of the Country South of Piet Retief - Humphrey, W. A. & Krige, L. J.

An explanation of the Geological Survey map (not present). Content: I. AREA AND PHYSICAL FEATURES (HUMPHREY) 1. Area, 2. Topography, 3. Drainage, 4. Mineral Springs, II. GENERAL GEOLOGY (HUMPHREY) 1. Main Features, 2. Formations III. SWAZILAND SYSTEM (KRIGE) 1. Quartzites, Mica-schists, etc., 2. Basic and Ultrabasic Schists IV. PONGOLA SYSTEM. (KRIGE) 1. Lower Pongola Series, 2. Upper Pongola Series, 3. Intrusive Rocks and Quartz Veins, 4. Metamorphism, 5. Structure, 6. Age and Correlation V. GRANITE (HUMPHREY AND KRIGE), VI. POST-GRANITE AND PRE-KARROO INTRUSIVE ROCKS (KRIGE) 1. Gabbro and Granophyre, 2. Diabase, VII. KARROO SYSTEM (HUMPHREY), 1. Dwyka Series, 2. Ecca Series, 3. Beaufort Series VIII. KARROO DOLERITE (HUMPHREY AND KRIGE) IX. ECONOMIC GEOLOGY (HUMPHREY AND KRIGE), 1. Gold, 2. Talc, 3. Asbestos, 4. Mica, 5. Kaolin, 6. Corundum, 7. Coat, 8. Iron.

Softcover. English. The Government Printer, Pretoria. 1931. ISBN: 0. 72pp. Good condition in marked wraps, name on covers. Book No: 2503068