Figure F6. Porosity and permeability vs. depth for samples, dependent upon amount of alteration. Fresh refers to relict plagioclase, pyroxene, and glass. X = permeability measurements that are not considered reliable because of failure during testing. A. Porosity vs. depth for samples with >5% fresh rock. Solid circles = >20% fresh rock (termed highly altered in text); open circles = 5%–20% fresh rock (termed very highly altered in text). B. Porosity vs. depth for samples with <5% fresh rock (termed completely altered in text). C. Permeability vs. depth for samples with >5% fresh rock. Solid circles = >20% fresh rock; open circles = 5%–20% fresh rock. D. Permeability vs. depth for samples with <5% fresh rock.

Figure F6. Porosity and permeability vs. depth for samples, dependent upon amount of alteration. Fresh refers to relict plagioclase, pyroxene, and glass. X = permeability measurements that are not considered reliable because of failure during testing. A. Porosity vs. depth for samples with >5% fresh rock. Solid circles = >20% fresh rock (termed highly altered in text); open circles = 5%–20% fresh rock (termed very highly altered in text). B. Porosity vs. depth for samples with <5% fresh rock (termed completely altered in text). C. Permeability vs. depth for samples with >5% fresh rock. Solid circles = >20% fresh rock; open circles = 5%–20% fresh rock. D. Permeability vs. depth for samples with <5% fresh rock.