Trilobite

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  • The Burgess Shale By Charles D. Walcott

    1731 Words  | 7 Pages

    was discovered by Charles D. Walcott in 1909. Walcott spent 18 years collecting and classifying the fossils located at this site. The Shale was formed about 530 million years ago, in the Cambrian Period. Most Cambrian rocks contain fossils of trilobite shells, cap-shaped or flattened shells, and brachiopods (Whittington, 1985). When Walcott went looking for North American Cambrian fossils in August of 1909, he ended up in the Canadian Rocky Mountains. He and his wife found a loose block in the

  • Characteristics Of The Horseshoe Crab

    1840 Words  | 8 Pages

    Introduction: “Limulus polyphemus, the horseshoe crab, inhabits shallow-brackish marine environments ranging from the Atlantic Ocean along the North American coastline to the Gulf coasts of the United states and from the East coast of Mexico to the Yucatan Peninsula” (Walls, Elizabeth). There are three other species of the horseshoe crab worldwide: Tachypleus tridentatus, Tachypleus gigas, and Carconoscorpinus rotundicauda that closely resemble Limulus in structure and habits, ranging from the

  • The Burgess Shale Fauna

    1596 Words  | 7 Pages

    B.ED. SCIENCE WITH SPECIALISATION IN BIOLOGY   Table of Contents The Burgess Shale Fauna 3 Introduction 3 History of Discovery 3 Preservation Bias 4 Major Fossils 4 Concluding remarks: 7 References: 8 The Burgess Shale Fauna Introduction The Burgess Shale Fauna is a fauna that was constructed based on a group of fossils that were initially found, in the Burgess Shale area in the Canadian Rockies (Gould, 1989). They are a very important group of fossils as “modern multicellular

  • Cambrian Period

    2628 Words  | 11 Pages

    Cambrian critters has been found in the Wheeler Shale and the Marjum Formation, both of which are exposed in the House Range. * Marble Mountains - In the hottest part of the Mojave Desert of California is the rich Latham Shale where Olenellid trilobites are numerous. * White-Inyo Mountains - You can visit ancient reefs in the mountains of eastern California. Cambrian life Explosion of Invertebrate Life During the Cambrian Period there was an explosion of life

  • Ordovician Life

    734 Words  | 3 Pages

    For a long period, up till now, I loved the early life of earth. Kimberella, Dickinsonia, and, later in time, Hylonomus were some of the creatures I studied. To find out, I went online to look around. The first question I looked at, to me at least, was the diversity of life in the early periods of life, specifically the Ordovician. To find out the answer, we must go back in time, at the beginning of the Ordovician in fact, to find out the answer. I started my research on this topic by surfing the

  • The Quaternary Period and Other Periods

    681 Words  | 3 Pages

    Cambrian: • This period started 540 million years ago and ended 500 million years ago. • There was a very mild climate. The supercontinent Rodinia began to break into smaller parts, or continents. Lots of glaciation occurred so many animal families went extinct. • All phyla develop during this time period. Many marine animals, shell-fish, echinoderms, and some of the earliest fish appear. • Lots of glaciation occurred wiping out many animal families marking the end of the Cambrian period.

  • Overview of Earth´s History and Periods Essay

    2814 Words  | 12 Pages

    area was almost entirely ocean, and most of the world's land was collected into the southern supercontinent Gondwana. Throughout the Ordovician, Gondwana was submerged underwater. This period is best known for its animals, including graptolites, trilobites, brachiopods, and the conodonts. Plants invaded the land during this period. The most recent types of like animal was tetrahedral spores that are similar to land plants have been found, suggesting that plants invaded the land at this time. Later

  • Horseshoe Crabs

    573 Words  | 3 Pages

    particular, were trilobites. Trilobites are extinct but are closely related to horseshoe crabs, who are on the endangered species list. The most obvious similarity is they are both aquatic species. Trilobites and horseshoe crabs side by side comparison shows a close match in both shape, elliptical, and size as well as having a tail. Eurypterid, also known as sea scorpions, and scorpions are relatives to trilobites and horseshoe crabs. Scorpions do not share the same outer shell shape as trilobites or horseshoe

  • Paleolithic Era Research Paper

    436 Words  | 2 Pages

    Houston Museum of Natural Science features Trilobites from the Middle Devonian, which were found in Silica Shale in Lucas County of Ohio. This particular genus of trilobites, “Eldredgeops milleri,” have large eyes containing a separately set lenses without a common cornea. Its thorax has 11 segments. Trilobites are some of the earliest known arthropods. Since these particular trilobites had good vision, I imagine that they were one of the few genus of trilobites that were either predators or scavengers

  • The Geological History Of The Valley

    1435 Words  | 6 Pages

    Even though, it share similarity to the other region in the Western Northern America province, what make Death Valley unique is the characters of the mountains and desert valleys are in a grand scale than the others. In addition, varies rock type and formation which include volcanic, metamorphic, and sedimentary rocks makes the valley a great place for geological study (Green, 1997, p. 9). Today’s Death Valley we see has taken millions of years to take its present form. In this paper, we examining

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