much too long, almost bordering on self-indulgent. For Biological-Mineralogical Interactions ,b y example, I cannot imagine that anyone interested in

geomicrobiology have seen an enormous increase in devoted to case studies on feldspar and mafic mineral exposure, from specialist journals to the creation of weathering. Although the chapter is interesting and the specific sessions at both national and international con- author is clearly distinguished in his field, I do not feel ferences. Earth scientists are now becoming more aware that this warrants inclusion in this volume. Third, there of the vast role microorganisms play in mediating surface are some glaring omissions in the material covered by reactions in the entire geosphere. Unfortunately, there this volume, including, for example, the metal uptake has not been a general overview available in book form. eYciency of both bacteria and algae, the role of diatoms Until recently we have had to rely on Henry Ehrlich’s and Coccolithophoridae in silica and calcium carbonate Geomicrobiology, or a variety of published conference pro- biomineralization, respectively, and the importance of ceedings and short courses. None of these were entirely microorganisms in the geological past. I can only presume that this reflects the presence and/or absence of those appropriate for use either as recommended reading for participating in the short course. Perhaps the editors university undergraduate courses or for those scientists should have solicited contributions from a few other interested in attaining some basic knowledge of how researchers, as this volume would have been improved