Word: sedimental
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...silt – “That’s just normal sediment. Pieces of rust from the pipes themselves… minerals mostly,” according to John P. Boucher, supervisor for fire safety services for FMO Fire Group – may color the water, making faucets run yellowy-orange water...
...silt – “That’s just normal sediment. Pieces of rust from the pipes themselves… minerals mostly,” according to John P. Boucher, supervisor for fire safety services for FMO Fire Group – may color the water, making faucets run yellowy-orange water...
Hydrant testing may disturb the sediment that naturally occurs in the water piping system. Water from your faucets and toilet may appear rust colored from this disturbance. Rust discoloration may last for several hours after the tests have been completed. Discolored water does not usually present a health hazard, however; it is recommended that anyone who has doubts about the rust colored water should not drink it. If you do not have bottled water, you may wish to store tap water in your refrigerator for the day of the test...
...Keller and Addate worried that we were misreading both the geologic and fossil records. They conducted surveys at numerous sites in Mexico, including a spot called El Peñón, near the impact crater. They were especially interested in a 30-ft. layer of sediment just above the iridium layer. That sediment, they calculate, was laid down at a rate of about 0.8 in. to 1.2 in. per thousand years, meaning that all 30 feet took 300,000 years to settle into place...
...impact site makes the results even less reliable. Earthquakes and tsunamis that resulted from the collision could have wrought havoc on the sedimentary record, causing discrete strata to swirl together and completely scrambling time lines. Keller disagrees, pointing out that the slow accretion of sediment that she and Addate recorded is completely inconsistent with a sudden event like a tsunami. (See pictures of animals in space...