resolution Imaging Spectroradiometer) sensor on the Earth Observing System satellite. MODIS provides a n enhanced remote-sensing capability (33) that will enable precise monitoring not only of the interaction of smoke with clouds but also of the spatial distribution of precipitable water vapor, presently available only from sparse radiosonde data. A t that time, testing the hypothesized impact of water vapor on the smoke-cloud interaction will be possible. perterrane, (ii) the correlation of features version temperature of aragonite to calcite sity of Washington, Seattle, WA 98195, USA. found within the Insular Superterrane (-100°C) is lower than the blocking tem-J. M. Hurtado, Department of Earth, Atmospheric, and Sciences, Massachusetts of Technol. with similar features found inboard of it, perature of the fine-grained ferromagnetic oclv, Cambrdcle, MA 021 39, USA. and (iii) features limiting the offset across particles (-400' to 580°C) that record the J Y~. Kirschvink, Division of Geologica and Planetary Scitranscurrent faults to Galues less than natural remanent magnetism (NRM) in ences, California Institute of Technology, Pasadena, CA 91 125, USA. those proposed by the BBC hypothesis. many clastic sediments and (ii) the presence K. L. Verosub, Department o f~e o~o g y , University o f c a -Paleomagnetic evidence relies o n the de-of organic macromolecules in the fossils iniiornia, Davis, CA 9561 6, USA.termination of paleolatitudes, which are dicates that little fluid has passed through *To whom correspondence should be addressed. derived from either igneous or sedimenta-the sediment after deposition, retarding di-