Sentences with phrase «silt deposited»

The Capital Region largely sits on clay and silt deposited by a lake that swallowed the area during the last Ice Age, said Andrew Kozlowski, an associate state geologist at the State Museum and director of the state Geologic Mapping Program.

The marina also will be dredged to remove silt deposits, which have made it shallower and less accessible to larger boats, town officials said.

We can thank the sand and silt deposits for giving off that effect.

Although the trend line from undersea discharges and silt deposits is clearly positive, the collective trend line from all physical volume changes could be either positive or negative and could change abruptly.

Not exact matches

Babylonia was rich in its alluvial soil, the age - long deposit of the Euphrates and the Tigris, those two great rivers that year after year unceasingly carried their load of silt to a resting - place, first in the Persian Gulf, then in the swamps that were slowly forming, and at length in the plain which gradually emerged from the waters, though at inundation each year it once again was claimed by the floods that had made it.

Ancient riverbed deposits of mud rock — rocks containing bits of clay and silt smaller than grains of sand — began increasing around 458 million years ago, around the time that rootless plants became common across Earth, researchers say.

Cities need to add a layer of preparedness, such as land - use restrictions in flood - prone areas, provisions for groundwater pumping and regular dredging in some areas to minimize silt and sand deposits on riverbeds following heavy rainfall.

The clinching evidence for this was that cracks in Lajia created by the quake were filled with flood - related sediment, not the fine silt sediment deposited by annual rainwater runoff at the same site each year, showing that the flood sediment got there first, and so must have arrived within a year of the quake.

They can then use radiocarbon dating to determine when more or less silt was deposited.

Silt is a solid, dust - like sediment that water, ice, and wind transport and deposit.

In fact, it is alluvial silt that washed down from the surrounding mountains and deposited on the shores.

He reveals the most daunting water issues we face today, among them the threat of flooding in China's Yellow River, where rising silt levels will prevent dykes from containing floodwaters; the impoverishment of Pakistan's Sindh, a once - fertile farming valley now destroyed by the 14 million tons of salt that the much - depleted Indus deposits annually on the land but can not remove; the disappearing Colorado River, whose reservoirs were once the lifeblood of seven states but which could dry up as soon as 2007; and the poisoned springs of Palestine and the Jordan River, where Israeli control of the water supply has only fed conflict between Israelis and Palestinians.

In 1969 the river breached the north bank, flowed through an area that had historical been part of the estuary, flooded a new golf course and Harbor Boulevard, and deposited silt and debris into recently completed Ventura Harbor just upcoast from the reclamation facility.

The silt jetties were built up over hundreds of years through the depositing of silt brought from the mountains and left along either side of the stream flow as it entered Lake King.

They can then use radiocarbon dating to determine when more or less silt was deposited.

Regarding Bangladesh, there was something in the press about a year ago that said Bangladesh is actually ADDING land area, because so much dirt / glacial silt is washed down the huge rivers, and is deposited in the deltas, so that even with sea level rise, more land is created.

The drill core penetrated 514 m of silts and silty clays (glacial deposits) punctuated by muds and episodic 0.02 — 1.2 m thick terrigenous sands (interglacial deposits) 22.

The yearly run - off river floods actually deposit enriched silt from the upland forests on the delta which facilitates some of the best food - growing regions in the world.