TABLE 1.

Sample and library summary

Rock source	Expt type	Template	No. of expts	No. of libraries	Leachate pH range
Duluth Complex	Humidity cell	DNA	6	20	4.5–6.9
		RNA	6	7	4.5–6.9
	Reactor	DNA	13	17	5.3–7.2
	Covered reactor	DNA	3	4	6.6–6.7
	Field rock pilea	DNA	1	29	4.7
	Humidity cell, subsampledb	DNA	3	6	4.5–6.9
Ely Greenstone	Humidity cell	DNA	6	15	3.7–6.4
		RNA	6	6	3.7–6.2
	Field rock pilea	DNA	2	18	7.2–7.3
	Humidity cell, subsampledb	DNA	2	4	3.7–4.5

^aField rock piles were sampled at multiple different locations and at two depths (2.5 and 15 cm). Details in Data Set S1 in the supplemental material.

^bMaterial was subsampled from the top and middle of certain humidity cells.