Assertion: peat's root | /r/CapableOf | extend into underlying mineral substratum
Facets:
Source sentences:
text: Page 21 PEAT RESOURCES IN ALASKA 21 102-120 inches; sedge peat, brown, felty fibered, somewhat compacted and partially decomposed; the material is grayish brown and sandy at the lower level; it contains seeds of buck bean (Menyanthes trifoliata), collodial organic residue, herbaceous plant remains, and roots and rhizomes which extend into the underlying mineral substratum.