Macro-cosmological structures in the form of black streaks (in the space), formed by density of earth-bodied beings and earth-bodied Pudgalas (material aggregates). It is situated in the Ūrdhvaloka (upper cosmos).
'kṇharāīo' tti kṛṣṇavarṇapudgala-rekhāḥ.
(Bhaga 6.89 Vṛ)
kaṇharātīo......puḍhavīpariṇāmāo......jīva pariṇāmāo vi, poggalapariṇāmāo vi...
(Bhaga 6.104)