marker horizon
Geology
noun
A layer of sedimentary rock possessing distinctive characteristics (as particular minerals, chemicals, or fossils) which enable it to be recognized at different locations; a marker bed.
Origin
1940s.
- passade
- passado
- passage
- passageable
- passage bed
- passage bird
- passage-board
- passage boat
- passage-gallery
- passage grave
- passage hawk
- passage migrant
- passage money
- passage of (or at) arms
- passager
- passagere
- passage thermometer
- passageway
- passagework
- Passaic
- passalid
- Passamaquoddy
- Passamaquoddy Bay
- passament
- passamezzo