The UC Riverside team and colleagues tracked phosphorus concentrations through Earth's history by analyzing the composition of iron-rich chemical precipitates
that accumulated on the seafloor and scavenged phosphorus from seawater.
This plant capacity is intended to handle the presently contemplated production of 10,000 t/a from Nechalacho, any future Avalon production increases, and process material from other potential future producers, especially those producing chemical precipitates
rich in the heavy rare earths.
The juxtaposition is argued to record brutally hot greenhouse conditions, but as detailed sedimentological data accrue, such strata are revealed to be not primary chemical precipitates
but are detrital in origin, principally the deposits of turbidites reworking old carbonate deposits, and comprise an integral part of very thick marine successions containing poorly sorted mass flows misidentified as tillites.