DCHP-1 Online
gum bed Obs. 
See quotes.
- 1876 (1888) Sometimes you came upon patches of "gum-beds," as they called them, where the ground was like tar, and smelt strong.
- 1889 In the neighbourhood of Oil Springs are situated the 'gum beds.' These are tracts of about four acres each--there are two of them--covered by a crust varying from two or three inches to about as many feet in thickness; the accumulation, it may be supposed of ages, being a residuum from the oil forced to the surface. . . .
- 1876 (1888) Sometimes you came upon patches of "gum-beds," as they called them, where the ground was like tar, and smelt strong.