FIGURE 2 in New fossil mussels (Bivalvia: Mytilidae) from Miocene hydrocarbon seep deposits, North Island, New Zealand, with general remarks on vent and seep mussels

FIGURE 2. Generalized stratigraphy of the East Coast Basin, showing schematically the Miocene-age hydrocarbon seep carbonates that occur as isolated lenses with in the mudstones of the Tolaga Group. The organic-rich, underlying Waipawa Black Shale is thought to be one of the likely source rocks. Bx: Bexhaven Limestone; ESE: east-south-east; Ih: Ihungia Limestone; To: Tolaga Group; Wb: Weber Formation; Wn: Wanstead Formation; WNW: west-north-west; Wp: Waipawa Black Shale. Figure modified from Campbell et al. (2008).