List four documents which may be prepared before the actual field work​

Questionnaires / interview, diaries, maps and procedure for data collection.

Explanation:

Before going for the ford work one need tp have do research and planning. For this a research  design is needed. As field work need to collect raw data one needs to make use of formal and informal methods.

Magma forms by partial melting of upper mantle and crust. partial melt means that only a fraction of the available material forms a melt, and that the remainder stays solid. the partial melt rises because of its lower density and ascends through he crust. this is so conclusive mean the answer would be magma igneous rocks or balistic magma.