This paper proposes an account of final devoicing in Friulian which relies on contrastive feature specification and feature geometry to explicate the connection between final devoicing and vowel lengthening. It is proposed that obstruents which are the outcome of final devoicing are phonologically distinct from true voiceless obstruents, being completely unspecified for laryngeal features. It is argued that the representational deficiency of such delaryngealized obstruents is directly connected to their inability to license a mora, which opens the way to vowel lengthening. More generally, the paper shows how feature geometry may be adapted to capture the effects of contrastive specification and express markedness relations, and proposes a novel approach to hierarchies involving the sonority of coda segments.Keywords: final devoicing, moraic theory, sonority hierarchy, feature geometry, Romance languagesThe present paper has two purposes. Empirically, it focuses on final devoicing in Friulian and on the connection between final devoicing and vowel lengthening. Its aim is to account both for the phonetic phenomena involved in final devoicing and for the fact that stressed vowels are lengthened before devoiced obstruents (but only in a word-final syllable). From a theoretical perspective, the paper takes up several strands of recent research into markedness relations. I argue that feature specifications should be assigned solely on the basis of phenomena attested within Email address: pavel.iosad@uit.no (Pavel Iosad)