The crystal size distribution model that is now in frequent use in the geosciences was first introduced by Marsh (1988) and by Cashman and Marsh (1988). In a recent paper, however, Pan (2001) questioned the validity of this model and concluded that there is an inherited correlation of −3 ln(L) versus L, which predominates, and which flaws the analysis to the extent that the parameters controlling crystal growth cannot be correctly inferred. In this comment we re-examine the mathematical treatment of Pan (2001) and find that his conclusions are erroneous, and thus that there are no new...

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