Current versions of feature geometry generally locate the features [consonantal] and [sonorant] as annotations on the root node, rather than as normal dependents of that or some other node. This geometry is intended to reflect the observation that, unlike other features, the major class features do not participate in phonological processes such as assimilation (spreading of a feature) or dissimilation (delinking of that feature). This article disputes the empirical observation concerning [consonantal]: several examples are provided where vowels or glides become consonantal next to consonants (assimilation) and where consonants become vowels or glides next to consonants (dissimilation). The feature geometry is modified to allow for such processes by placing [consonantal] as a daughter of the root node.