Calcite

Egyptian religion. Each of these animals plays a very important role in Ancient Egyptian lifestyle and how they could all be connected. The first object I picked was the “Head of a calcite figure of a cow”. This is supposed to represent the animal manifestation of the goddess of the west, Hathor. The “Head of a calcite figure of a cow” is coloured white because it represents omnipotence and purity. Hathor was well known as the goddess of fertility and the reason for this is that he is the protectress

Toxic Compounds Another theory that some proposed as the cause of the Triassic-Jurassic mass extinction is high levels of toxic compounds released from volcanic activity. Directly around volcanic activity in the rift zone, there perhaps would have been high levels of Fluorine and Chlorine, both of which could have directly poisoned organisms. These large ejections of Chlorine and Fluorine could have led to ozone depletion and acid rain (McHone 2003). However, due to the fact that high levels of either

Olufemi Palmer Dr. Josef Wegner NELC 062 3 March 2017 A Statue of a Sphinx (Object E12326) A sphinx is a mythical creature with the body of a lion and the head of a human. These creatures were built as sculptures near the temples as guardians. A sphinx symbolizes the intelligence of man united with the physical dominance of a lion (Giblin 121). The sphinx is a purely Egyptian creation, that was first started in the 4th dynasty at about 2575 BCE (Giblin 23). In Egypt sphinxes were generally associated

Organic archaeological specimens, matter that was once living, such as bone, shells, skins, fibers, wool, etc., are all dated by use of radiocarbon dating (anything that once lived). The radiocarbon dating process measures the Carbon-14 isotopes within the organic material being examined. This method measures the radioactive emissions from the once living matter, comparing its activity with the equilibrium level of living things, a measurement of the time elapsed can be made. The radioactive isotope

Textulariina lost a third of genera; Miololina lost half of the genera; Lagenina and Involutina showed dramatic increase in post extinction radiation. Sponges (Porifera), the basal animal group (left), composed of an internal skeleton of spicules of calcite or silica, and forming reefs. There were

They also have a skeleton composed of numerous plates of calcium carbonate. 2.1 Stereom The plates that compose brittle starfish, ophiuroids and echinoderms is calcite along with other organics. Though each plate is a single crystal of calcite, it doesn't take a typical crystalline form. Below is a picture of the tooth socket, notice the holes. 2.2 Water Vascular System Perhaps not as obvious is the water vascular system, another trait common

but it can also be used to mean the shells of a wide variety of marine animals from different phyla. The composition of seashells have three distinct substances involved: the outer layer of the horny substance conchiolin, the intermediate layer of calcite, and the smooth inner layer composed mainly of calcium calbornate. The blood of a mollusk is rich in a liquid form of calcium. A soft outer organ called the mantle concentrates the calcium in areas where it can separate out from the blood, forming

colour of a mineral as seen in its powdered form is called it's ________. A) Birefringence B) chatoyancy C) iridescence D) streak 14) Which one of the following minerals has the greatest hardness on the Mohs hardness scale? A) Feldspar B) calcite C) gypsum D) topaz 15) Which of the following best defines a mineral and a rock? A) A rock has an orderly, repetitive, geometric, internal arrangement of minerals; a mineral is a lithified or consolidated aggregate of rocks. B) A mineral consists

when it is powdered is called the streak of the mineral. Physical properties metallic adamantine glassy The luster of a mineral is the way its surface reflects light. pearly dull waxy Hardness-Mohs scale 1 talc 2 gypsum 3 calcite 4 fluorite 5 apatite 6 feldspar 7 quartz 8

Review of Literature Introduction to Caves According to Dictionary.com , a cave is an underground hollow with access from the ground surface or fromthe sea, often found in limestone areas and on rocky coastlines. The way caves develop and form is called speleogenesis. Caves form when weathering of rocks, erosion, pressure, and chemical transactions takes place. Caves can take over thousands of years to form and age back to centuries ago. Most caves are usually found in limestone. Because