slime pit
  產瀝青的礦
  Slime n.
  1. Soft, moist earth or clay, having an adhesive quality; viscous mud.
  As it [Nilus] ebbs, the seedsman
  Upon the slime and ooze scatters his grain.   --Shak.
  2. Any mucilaginous substance; any substance of a dirty nature, that is moist, soft, and adhesive.
  3. Script. Bitumen. [Archaic]
     Slime had they for mortar.   --Gen. xi. 3.
  4. pl. Mining Mud containing metallic ore, obtained in the preparatory dressing.
  5. Physiol. A mucuslike substance which exudes from the bodies of certain animals.
  Slime eel. Zool. See 1st Hag, 4.
  Slime pit, a pit for the collection of slime or bitumen.