Complex sentence: The coastal cliffs, which are at most above sea level line the southern border, with lava flows forming intricate geomorphological structures, highlighted by the area of Lajinha (on the eastern border).
Split into simpler sentences: The coastal cliffs, which mark the southern border of the town, are at most above sea level. Lava flows formed intricate geomorphological structures, highlighted by the area of Lajinha (on the eastern border).