fucoid การใช้

• True fossil fucoids are quite rare.
• In a layer of red shale that is at least thick, there are fucoid fossils.
• In the late 1800s, a large number of plants resembling fucoids were discovered along Catawissa Creek near the border of Main and Catawissa Townships.
• It predominantly grows on the lower shore, especially where fucoid algae are absent, but is also found further up shore on exposed coasts.
• Early paleobotanists misidentified a wide variety of structures they found on the bedding planes of sedimentary rocks as fucoids ( Fucales, a kind of brown algae or seaweed ).
• Species growing here include sea thrift, sea arrowgrass, sea plantain, common salt marsh grass, " Juncus gerardii ", " Juncus maritimus " and turf fucoids.
• Studies in the 1880s by A . G . Nathorst and Joseph F . James comparing'fucoids'to modern traces made it increasingly clear that most of the specimens identified as fossil fucoids were animal trails and burrows.
• Studies in the 1880s by A . G . Nathorst and Joseph F . James comparing'fucoids'to modern traces made it increasingly clear that most of the specimens identified as fossil fucoids were animal trails and burrows.
• These sandy beds are often found covered with ripple-marks and annelid tracks; one of the uppermost sandy layers is known as the " Fucoid bed " from the abundance of the seaweed-like impressions it bears.
• It is composed of the following subdivisions in ascending order : falsebedded quartzite, Pipe Rock quartzite, fucoid beds and Olenellus band, serpulite grit, Durness dolomite and marble, Durness dolomite and limestone : but these are not always visible at any one spot.