One can find a detailed discussion of various assimilatory processes targeting consonants such as palatalization, nasalization and voicing.
It is clear from the above data that nasalization is not arrested by underlying nasals.
The expressive usage of pitch, aspiration, labialization, and nasalization are peculiar to female speech.
Both of these languages also employ vowel nasalization.
It is also the case for vocalization and nasalization.
The diachronic link between lengthening and subsequent nasalization is necessary but is completely accidental.
Obstruent stops are therefore both targets of nasalization and opaque to the process.
Lengthening, even in closed syllables, is frequent and is independent of nasalization.