In Jain cosmology, the universe (loka) is described in great detail, including its various parts and continents. According to Jain scriptures, the central part of the universe where humans reside is called "Madhyaloka." Within Madhyaloka, there are particular divisions known as "Kshetras" and "Dvīpas" (islands or continents).

Jain cosmology speaks of Jambūdvīpa as the central continent, surrounded by rings of oceans and other continents. Traditionally, Jain texts mention seven continents (Saptadvīpa), each surrounded by an ocean. These are:

1. Jambūdvīpa
2. Dhātakīkhaṇḍa
3. Puṣkaradvīpa
4. Varunāni
5. Kshirarnava
6. Ghritarnava
7. Ikshurasa

The concept of "six earth parts" is not directly mentioned in Jain scriptures. However, Jainism does recognize six types of living beings (jīvas), and the universe is divided in various ways, but not specifically as six earth parts.

If you meant something specific by "six earth parts," please clarify, and I can try to relate it to Jain cosmological teachings.