Climate change 400,000 years ago
Professor Dave Horne has been working in the pit with students, recording sections and collecting samples for microfossel analysis. Marks Tey is well-known for its 400,000 year old interglacial (warm climate) lake clays which are mostly hidden below the present bottom of the pit, accessible only by coring. Dave and his team are focusing on the overlying lake and river deposits exposed in the sides of the pit, which are gradually yielding evidence of a transition from warm conditions to a colder climate. The tiny fossil shells of ostracods, microscopic crustaceans that live today in lakes, rivers and ponds as well as the sea, can be extracted from sediment samples and provide clues to the environmental and climate conditions during the period when the Marks Tey lake existed.
link to Dave Horne's website: www.geog.qmul.ac.uk/staff/hornd.html