In the parts of Etna that we went over, I saw no stratas of pumice stones, which are frequent near Vesuvius, and cover the ancient city of Pompeii; but our guide told us, that there are such in other parts of the mountain.
The ice which incloses them lyes in several stratasof unequal thicknesses which are seperated by streams of water.
I could observe no regular stratas of it, tho it lies on the sides of the river hills in large irregular masses, in considerable quantities; it is of a light colour, and appears to be of an excellent quality.
The thin Stratas of hard free Stone intermixed with the Soft Sand Stone Seems to have aided the water in forming this Curious Scenery.
Soil of which is not very rich they are Stoney & Contain Several Stratas of white rock.
Our attention is next drawn to the planet Saturn, which, we are informed, is not only shining in his starry sphere of the heavens, but is also buried in the ocean depths and embodied in the stratas of the earth.
Above this river the bluffs of the Missouri are of red earth mixed with stratas of black stone; below it we passed some white clay in the banks which mixes with water in every respect like flour.
There are greater appearances of coal than we have hitherto seen, the stratas of it being in some places six feet thick, and there are stratas of burnt earth, which are always on the same level with those of coal.
Within three and a half miles further we came to a small island on the north, and a remarkable bluff composed of earth of a crimson colour, intermixed with stratas of slate, either black or of a red resembling brick.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "stratas" in a variety of sentences. We hope that you will now be able to make sentences using this word.
