Table S2.

Layer and solid volumes for each beam sample and associated relative density

Sample	Vcribrum, µm3	Vareolae, µm3	Vbasal, µm3	Vrim, µm3	Vsolid, µm3	ρrelative
1	25.05	20.38	44.80	4.20	280.65	0.336
2	17.98	28.46	35.84	1.38	322.33	0.260
3	38.40	39.75	57.39	5.01	455.15	0.309
4	20.52	16.30	21.80	1.80	196.42	0.308
5	27.84	22.17	28.83	2.51	277.52	0.293