tributary of the Nile, the Wadi Howar or Yellow Nile, which flowed from
western Chad towards the Nile roughly between the third and the fourth cat-
aract (Pach ur & Kro
¨
pelin 1987), provided the geographical conditions for this
areal contact zone between regions east of the Nile and the zones towards the
west. There is solid archaeological evidence that this region indeed constituted
a diffusional zone for various cultural traits, such as pastoralism and the use of
Leitband pottery traditions (see Jesse 2000; Keding 2000). The numerous
typological traits shared between the Ethiopian Afroasiatic languages and the
Nilo-Saharan languages stretching from northern Ethiopia and Eritrea all the
way towards Chad would therefore seem to present an additional piece of
evidence for such an ancient contact zone. (See also Amha & Dimmendaal
2006a.)
In his survey of constituent order types in Africa, Heine (1976) pointed out
that the Nilo-Saharan groups in this area are typologically similar to Afro-
asiatic groups in Ethiopia, more specifically Cushitic, Omotic, and Ethio-
Semitic. Not only do these various groups share the same word order type,
according to the author, they also use case markers and postpositions in order
to express predicate frames, with adverbial clauses preceding main clauses.
6
From the map with areal nuclei in Heine (1976) it is clear that the author
assumed that these Nilo-Saharan languages acquired these typological prop-
erties (associated with type D in Heine’s typology) through areal diffusion
from the Ethiopian Afroasiatic zone. But it is also possible that the diffusion
went in the other direction, given the fact that this phenomenon is also
widespread in Nilo-Saharan groups that are distantly related to each other.
As already discussed above (and as illustrated on map 9.1), the current
distribution of these Nilo-Saharan groups is partly diffuse. Thus, one of the
languages sharing the predominantly verb-final syntax, postpositions, and the
extensive use of case marking is Nyimang, a language spoken in the Nuba
Mountains and surrounded by Kordofanian languages, i.e. by Niger-Congo
languages which are genetically and typologically distinct from the Nilo-
Saharan languages.
Case marking is a prominent feature of Nyimang, as table 9.1 helps to show
(data collected by the present author). Nyimang appears to be a fairly strict
verb-final language. But again, the relatively poor descriptive state of this lan-
guage at present prevents us from making more firm claims on clausal structures
in this respect. This caution also applies to nominal phrases. Rather character-
istically for Nilo-Saharan as a whole, verb-final languages such as Kanuri
(Saharan), Bura Mabang (Maban), Fur, Kunama, or Eastern Sudanic languages
such as Dongolese Nubian or Nyimang, appear to put nominal modifiers such as
adjectives and demonstratives after the head noun. But even closely related
languages like Nyimang and Afitti appear to differ in terms of head–modifier
relations at the nominal level. Thus, Tucker and Bryan (1966: 252) observe an
Africa’s verb-final languages 285