At the base is the so-called "blue clay" (really greenish) with ferruginous sandstones and with a fucoidal sandstone at its summit.
Above the fucoidal sandstone an important break appears in the system, for the Paradoxides and Olenus divisions are absent.
I have seen what I deemed fucoidal markings dimly impressed on the planes of some of the strata, not in the carbonaceous form so common in the other two formations, but as mere colored films of a deeper red than the surrounding matrix.
One of the lowest beds in Sweden has been named from their abundance the Fucoidal Sandstone; and wherever fossiliferous Cambrian rocks occur, some traces, more or less obscure, of these plants may be found.
In the fucoidal sandstone of Sweden certain striated or ribbed bodies have been found, which have even been regarded as land plants;[8] but they seem rather to be trails or marks left by sea-weeds dragged by currents over a muddy bottom.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "fucoidal" in a variety of sentences. We hope that you will now be able to make sentences using this word.
