Sentences with lacustrine
la·cus·trine
L l - These deposits of sand have always been formed by the disintegration of a siliceous rock, and the fragments so formed have been sifted and transported by the agency of water, being finally deposited by a river either in the sea (marine deposits) or in lakes (lacustrine deposits), while the action of water, either during transport or after deposition, has frequently worn the individual particles into the shape of rounded grains.
- These units are conformably overlain by fluvial and lacustrine volcaniclastic deposits, tuffs and hyaloclastites.
- It has been suggested that fluvial and lacustrine source rocks were locally deposited in grabens created along the transtensional edges of these rotating microcontinental blocks.
- These may be of fluviatile, glacial, periglacial, lacustrine, aeolian, or marine origin.
- Variations in the sediment supply were an important control on the relative development of fluvial channel and muddy overbank facies during periods of high clastic input and peat swamp and lacustrine facies when clastic input was lower.
- The quarry's paleogeography was generally thought to have been in a lacustrine environment with associated meandering streams.