For some microbes, initial encrustation involved the growth of small spheroids scattered irregularly along the length of the microbe.
Pollutants in the atmosphere and the attentions of birds and humans cause discolouration, encrustation and corrosion.
One corner of the quartz encrustation had been removed to show the underlying rhodochrosite.
It is not in question in this case as to whether that encrustation should be cut off.
Slight variations in the diameter along the length of some filaments reflect either the degree of silica encrustation or septa in the original filament.
But she did not test the entire area of that encrustation .
In the study of fossil populations, the timing of encrustation is important, although both encrustation during life or after death provides ecological and taphonomic data.
In all of these fossils, the symbiotic colony covers the entire external surface of a gastropod shell with a thick encrustation .
Its coral encrustation is so heavy that all the features of its breech-end are obscured, but around her sit the unmistakable shapes of unused shells, sitting in boxes like eggs.
I couldn't get over the stunning encrustation of the Munchen by soft corals at this depth, suggesting that the tide runs fast and hard over the wreck.