The preference for bimoraic stressed syllables in pre-Old High German necessitated the phonological restructuring of syllables with stressed, short vowels either by early implementation of open syllable lengthening (non-shifting dialects north of the Benrath line) or by triggering an autochthonous phonological shift of +t, +p, +k after short vowels (shifting dialects). From there, the OHG dialects “progressed” though the rest of the shift in a largely parallel fashion. Asymmetry of the shift of +-p and +-k and geminate +-pp and +-kk was caused by place bias, however, especially in the Rhenish dialects where tone accents could sometimes delay or block the shift of these segments. The greater susceptibility of the more marked labial and velar affricates (-pf- and −kx-) to weakening limited their later occurrence to dialects outside the Rhineland. The reanalysis of aspirated +t- [th], +p- [ph], +k- [kh] as affricates in initial position was possible only when the corresponding geminate had already shifted, exemplifying both the effects of place bias as well as a kind of phonological reanalysis Blevins (2004) calls “choice.”

In morphological theory, various models have been developed with respect to the appropriate levels of abstraction for stating morphological generalizations. This paper addresses a class of seemingly marginal and/or problematic phenomena in morphology and proposes that morphological descriptions regularly refer to two distinct levels of description. One is the level of “morphosyntax,” and one is the level of “morphophonology.” Furthermore, morphology is considered to be marginal if and only if the degree of isomorphy between representations on these two levels is reduced. This basic proposal is illustrated and tested with several central phenomena of morphology found in German: synthetic compounds, conversion, empty morphs, and trun-cation. The analysis proposed here argues for the necessity of a two-level model of morphology as an approach in which both abstract morphosyntax as well as more concrete morphophonology have a place.*