Extended Data Fig. 5: Evidence of subaerial exposure.
From: Rapid glaciation and a two-step sea level plunge into the Last Glacial Maximum
The blocky low-magnesium calcite meteoric cement that is related to subaerial exposure is initially precipitated in the intergranular voids of grainstone in 55A 5R1. Then peloids (p) of high-magnesium calcite formed under marine conditions and filled the remaining voids when they were submerged following re-flooding. Scale bar, 100 µm.
