Table S2.

Summary of proxy data used to define environmental motifs for AND-2A

Environmental motifLithofaciesProvenanceWeathering index (CIA)BiofaciesProxy SWT (TEX86 and Δ47) range (°C)Climate and glacial regime
EMISignificant time break (major erosion surface in core)NANANANACold polar conditions with ice sheets that advanced well into the marine environment
EMIIDominated by massive and stratified diamictite and bioturbated siltstone.High magnetic susceptibility, high Nb (volcanic signature), gravel derived from Koetlitz Glacier and Royal Society Range.LowVery rare fossil component−1.4 to 2.6Cold polar conditions with minimum marine-based grounding-line variability and persistent floating ice shelves and/or land-fast sea ice along the coast.
EMIIIaDominated by stratified diamictite and gravel with abundant stratified sandstone.Low magnetic susceptibility with low to moderate Nb, gravel source is typically mixed but includes clasts derived from the region between Mulock and Skelton glaciers.Moderate to highRare to common fossil content2.2–5.4Subpolar conditions with tidewater glaciers that calved at the coast.
EMIIIbDominated by stratified diamictite and gravel with common sandstone and siltstone.Low magnetic susceptibility with low Nb, gravel source is typically mixed but includes clasts derived from the region between Carlyon and Darwin glaciers.Moderate to highPalynomorphs rare to abundant, abundant molluscs0.2–6.7Subpolar conditions with tidewater glaciers that calved at the coast and periodically retreated onto land. Includes intervals when small regions of tundra spread along the coast.
EMIVDominated by stratified mudstone with common gravel and stratified diamictite.Low magnetic susceptibility with low Nb.HighDiatoms, palynomorphs, foraminifera, and molluscs abundant3.0–10.4Subpolar to cool temperate maritime climate along the coast. Glaciers grounded on land. Tundra growing from the coast to at least 80 km inland.
  • NA, not applicable.