Using the provided geological map, identify the feature with a N-S trend and the feature centered at grid reference 557166, providing reasons for your identification.

To answer these questions, I'll refer to the geological map we've been discussing.

c) i) Identify the feature having an almost N-S trend.

The most prominent linear geological feature on the map that has a significant North-South component in its trend is the fault. While its overall trend is more northeast-southwest, certain segments of the fault, particularly in the central-eastern part of the map, align more closely with a North-South direction.

c) ii) Identify, with reasons, the feature centered at grid reference 557166.

First, let's locate the grid reference 557166 on the map. This would be approximately at