Although some handbooks on the microscopic identiÂ In Part I the concept of heavy mineral analysis is fication of heavy mineral grains are available, a introduced and the relative significance of factors comprehensive manual illustrated in colour has not affecting heavy mineral assemblages is discussed. There been published until now. Because the appearance of are brief references to the commonly used laboratory minerals in grain mounts differs considerably from methods and auxiliary techniques. It concludes with those seen in a thin section, a different approach is some examples of the application of heavy mineral necessary for the identification of detrital grains. studies. Coloured photomicrographs, showing their colour Part II contains the descriptions of 61 transparent shades, pleochroism and interference tints, provide heavy mineral species, including those which are an excellent means of assisting recognition. As a commonly authigenic in sediments. Positive identiÂ number of mineral grains have similar optical properÂ fication of authigenic minerals is important to avoid ties and morphology, it is equally important to confusion and to help recognition of diagenetic describe them verbally in detail, pointing out events. In the mineral descriptions considerable characteristic features and differences. emphasis is placed upon detrital morphology and This book is intended primarily as a manual that diagnostic features. Optical properties and characterÂ describes and illustrates the transparent heavy minÂ istics are detailed, together with information on host erals most commonly found in sediments. It is hoped rocks.
Vancouver Island is an excellent place to hunt for unusual minerals, gems, semi-precious stones, fossils and gold. With its unique geological environment it is one of the finest locations for rockhounding in Western Canada. Featuring detailed maps ranging from Victoria through the Chemainus Valley and up to Port Hardy, "A Field Guide to Gold, Gemstone & Mineral Sites of British Columbia, Vol. 1" covers more than 100 sites on Vancouver Island and adjacent islands.
Simon Basher is back with another zany primer to science Following his 3 successful titles on the basics of chemistry, physics, and biology, ROCKS AND MINERALS is an in-depth look at the ground beneath our feet. Like his other titles, Basher presents these topics through charming and adorable illustrations and pairs them with basic information told from a first person perspective. He develops a community of characters based on the things that form the foundations of our planet: rocks, gems, crystals, fossils and more. And what's more, he makes it understandable, interesting, and cute. It's not what you expect out of a science primer.