Lagoon. A salt-water lake, or part of a sea nearly inclosed by a strip of land.
Laminated. Arranged in thin plates or laminæ.
Lenticular. Lens-shaped.
Lepidoides. Extinct fish of the Oolite formation.
Llandeilo flags. A division of the lower silurian formation of Murchison.
Lias. A provincial name now generally adopted to designate the calcareous clay or clayey limestone occurring between the Upper new red sandstone and the Oolite.
Ligneous. Woody.
Lignite. Wood converted into an imperfect kind of coal.
Lithology (lithos, a stone; logos, a discourse). Description of stones.
Littoral. Belonging to the shore.