 The Endeavour segment in the northern end of the ridge is another active and highly studied region.Sharp chemical and thermal contrasts, high levels of seismic activity, dense biological communities, and unique hydrothermal systems all make the segment a primary focus of research.Some of the most intense and most active Hydrothermal vents are located along the Endeavour segment, with more than 800 individual known chimneys within the ridge's central region, and a total of five major hydrothermal fields along the ridge.