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A new oxygen isotope (δ 18 O) record derived from conodont apatite reveals variable long-term climate trends throughout the Triassic period. This record shows several major, first order, negative shifts reflecting intense warming episodes, not only the well-known extreme PTB–Early Triassic event (∼ 5‰), but also two large cycles of similar magnitude (∼ 1.5,∼ 1.7‰) and duration (∼ 7 Myrs) during the late Carnian and late Norian. Between the PTB–Early Triassic and Carnian major episodes, three rapid shorter-term warming events of decreasing magnitude punctuate the mid–late Anisian, early Ladinian, and latest Ladinian, with distinct cooler (ie favourable) intervals characterising the early Anisian and early Carnian, indicating a fluctuating but ameliorating Middle Triassic climate trend. Two long periods of sustained cooler conditions occurred during the Late Triassic, for much of the Norian and Rhaetian. The …