What's the difference between scoria and scoriaceous?

Scoria

Definition:

• (n.) The recrement of metals in fusion, or the slag rejected after the reduction of metallic ores; dross.
• (n.) Cellular slaggy lava; volcanic cinders.

Example Sentences:

• (1) Scoria (volcanic cinder) was most effective in excluding roots of crested wheatgrass and streambank wheatgrass.

Scoriaceous

Definition:

• (a.) Of or pertaining to scoria; like scoria or the recrement of metals; partaking of the nature of scoria.

Example Sentences: