Stable carbon and oxygen isotope ratios of foraminifera from the latest Miocene to earliest Pliocene of Ceare Rise, western tropical Atlantic, supplement to: Pfuhl, Helen A; Shackleton, Nicholas J (2004): Changes in coiling direction, habitat depth and abundance in two menardellid species. Marine Micropaleontology, 50(1-2), 3-20

Helen A Pfuhl & Nicholas J Shackleton
We present a detailed study of menardellid speciation, abundance and coiling changes between 6.34 and 5.1 Ma (latest Miocene and earliest Pliocene). Menardellids are widely distributed in tropical to subtropical waters from Miocene to modern time, revealing a stable isotopic signature characteristic for the top of the thermocline and shallower rather than deeper habitat depth. Menardellid response to its environment reveals a tripartite pattern. The first interval from ~6.34 to 5.75 Ma is marked by...
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