The results show a strong correlation between high altitude and the presence of ejectives in languages on, or near, five of the six major high altitude regions on earth where people live.
According to the results, the only region with high elevation where languages with ejectives are absent is the large Tibetan plateau and the adjacent areas.
In Nootka voiceless stops may be distinctively ejective, and dorsals may bear distinctive secondary labialization.
Tolowa (Athabaskan, Northern Amerindian) has a contrast between plain and ejective stops in all oral noncontinuants; this contrast does not exist in the labials, however.
x [CHI] Nootka MOD constraints: VOICELESSSTOP/EJECTIVE Voiceless stops are ejective DORSALS/LABIALIZATION Dorsals are labialized
Here the MOD constraints express the fact that voiceless stops can be distinctively ejective.
An example in which affricates pattern with voiceless stops, in terms of their being potentially ejective, is Nootka, as shown in (20).
Since the Nootka affricates also have the features [-cont] and [-voice], these segments are predicted to have ejective counterparts.
w]/to result in a glottal stop, as in Takelma (Sapir 1912: 44), in which a labialized velar ejective before /xC/ becomes a glottal stop.