Extended Data Fig. 2: Putative stromatolites of the ISB at site A.
From: Reassessing evidence of life in 3,700-million-year-old rocks of Greenland
Yellow arrows point to triangular shapes with apices mostly pointing down relative to layering. Note, the stratigraphy was inverted, as the layers have been overturned1. Each of the triangles is approximately 4 cm across. The blue box shows the approximate outline of the sample acquired for the present study. The yellow box shows the area shown in Fig. 1.
