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.
' is really valuable and useful. It is not only a reference book but moreover a complete and rigorous study treatise, indispenssable for all prsons who need to learn about iron and its compounds, including the organic complexes and microbiological reactions. It plainly satisfies these aims and should be compulsory reading for university and research institute libraries. It is valuable for any scientist related with soil science, geology, sedimentology, geochemistry, mineralogy, or, more in general, anybody connected with the geosciences. It also provides a very good, up to date revision of iron literature up to 1987 and is, therefore, a rich source of information.' Geoderma, 47:1
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