Figure F5. Seismic reflection profile of the flank of Demerara Rise showing major sedimentary units and a heavily eroded Unit I. Key regional seismic markers are illustrated with Horizon C marking the transition from synrift deposition to hemipelagic and pelagic deposition of Cretaceous black shales. Horizon B´ correlates with the top of the Cretaceous black shale sequence, and Horizon B marks the K/T boundary. Horizon A is associated with an early Miocene erosional unconformity that removed most of the Neogene sediments from the flanks of the Demerara Rise (from Erbacher, Mosher, Malone, et al., 2004).

Figure F5. Seismic reflection profile of the flank of Demerara Rise showing major sedimentary units and a heavily eroded Unit I. Key regional seismic markers are illustrated with Horizon C marking the transition from synrift deposition to hemipelagic and pelagic deposition of Cretaceous black shales. Horizon B´ correlates with the top of the Cretaceous black shale sequence, and Horizon B marks the K/T boundary. Horizon A is associated with an early Miocene erosional unconformity that removed most of the Neogene sediments from the flanks of the Demerara Rise (from Erbacher, Mosher, Malone, et al., 2004).