Middle Norian
solitary corals dominant.
Corals>sphinctozoans>chaetetids

Part of abstract from 1306.
The Nimaloksa Fm. documents progradation of a carbonate ramp in the latest Camian (Lower Member), followed in the Early Norian by subtidal mixed carbonate/terrigenous sedimentation (Middle Member) and by platform carbonate deposits (Upper Member). Next, the major disconformity at the base of  the Alaror Group testifies to an extensional tectonic event, followed by rapid increase in quartzo-feldspathic detritus in the late Early Norian. Siliciclastic supply is reduced only during flooding stages, marked by oolitic ironstone or phosphatic condensed horizons ('Juvavites beds', 'Monotis shale'). Cleaner waters foster local development of knoll reefs around the Early/Middle Norian boundary ('Coral limestone'). Accumulation rates gradually begin to decrease before the close of the Triassic, when the 'Quartzite series' records a sharp regressive event, followed by renewed transgression at the base of the Kioto Group. 