Concretions Essay

1453 words - 6 pages

Dating back to the 18th century concretions have been known as geologic curiosity's due to the various sizes, shapes and compositions. Concretions have also been thought to be dinosaur eggs, extra-terrestrial debris, human artifacts and animal and plant fossils. Due to these curiosity's I will try and enlighten you more on these in the following by explaining the process in which they are formed and explaining some locations where they can be found in large outcrops. "The word "concretion" is derived from the Latin "con"-- meaning "together" -- and "cresco" -- meaning "to grow."" Concretions are hard compact accumulations of mineral matter and are found inside sedimentary rocks. Some examples of this are Sandstone and in some weathered volcanic rock. Concretions come in many different shapes and the most common of the shapes is spherical or disk shaped. Concretions are the most varied-shaped rocks of the sedimentary world. The way concretions come to be is the mineral matter concentrates around the nucleus of a host rock. The nucleus is often organic such as a tooth or leaf or shell or fossil. As the mineral matter concentrates around the nucleus it forms harder zones known as nodules. Concretions are very odd in the sense that they very in size, shape, color and hardness. Often concretions are mistaken for bones, fossils, meteorites and other odd objects. They can be so small that it requires a magnifying glass to be visible or as large as 10 feet in diameter and weigh hundreds of pounds. Concretions can also have somewhat of regular shapes such as boxes, blocks, flat disks, pipes, cannon balls and have even been known to resemble parts of a human body such as a foot or ribs. Concretions are most commonly composed of calcite but sometimes can be composed of iron oxide or iron hydroxide such as goethite. But also concretions can be composed of other minerals ranging from siderite, ankerite, dolomite, pyrite, baryite and gypsum. Concretions form in many different ways. The box shape of some ironstone concretions most often depend on the way a sandstone or shale bed breaks up due to the action of weathering into regular blocks of various sizes. The way in which this separation takes place along natural planes of weakness in a rock such as a horizontal bedding surface and vertical joints. Before this process of separation, as well as during the separation ground water soaks into the rock and circulates through the planes of weakness making the rock more porous. In these iron stone concretions water dissolves the iron compounds from the inner portion of a block and then deposits the iron compounds as insoluble iron oxide or iron hydroxide in the outer parts of the block. As the water dissolves the iron hydroxide/oxide and deposits them in the outer portion it cements together grains in the original host rock to make that specific zone harder. One way to tell that it is an ironstone concretion is that there is...

Find Another Essay On Concretions

Essay on Light and Dark in Antigone

1188 words - 5 pages Use of Light and Dark in Antigone   The "Golden Age" of Greece is noted for its many contributions to the creative world, especially in its development of the play. These performances strived to emphasize Greek morals, and were produced principally for this purpose. Antigone, by Sophocles, is typical. The moral focused on in Antigone is the conflict between physis (nature) and nomos (law), with physis ultimately presiding over nomos

charant Creon as the Main Character of Antigone

1231 words - 5 pages Creon as the Main Character of Antigone   Throughout the Greek play Antigone by Sophocles, there exists a dispute as to who should receive the designation of main character. Antigone, the daughter of the cursed King Oedipus, as well as Creon, stately king of Thebes, both appear as the key figures in this historic play. I believe that Creon, king of Thebes, should be considered the main character in this work of Greek theater. Three

Free Macbeth Essays: Sleep and Sleeplessness

525 words - 2 pages The Sleep and Sleeplessness Motif in Macbeth We have consciences that function to tell us the difference between right and wrong. If we have clear consciences, we usually possess the ability to sleep. But when our consciences are full of guilt, we experience a state of sleeplessness. In Macbeth, Shakespeare uses the sleep and sleeplessness motif to represent Macbeth's and Lady Macbeth's consciences and the effect Macbeth's conscience has on

Life Outside of Life in Hawthorne’s Wakefield

898 words - 4 pages Life Outside of Life in Hawthorne’s Wakefield   Efficacy lies at the heart of human desires for immortality. Characters throughout literature and art are depicted as wanting to step aside and see what their world would be like without their individual contributions. The literary classic A Christmas Carol and the more recent, but ageless, film It’s Wonderful Life both use outside influences (three ghosts and Clarence the Angel

Essay on Identity in Song of Solomon

2172 words - 9 pages Searching for Identity in Song of Solomon         Abstract: Whether Africans really fly or just escape a monumental burden, perhaps only through death, is a decision Toni Morrison has apparently left to her readers. Never the less, no matter what you believe, within Song of Solomon, the suggestion is, that in order to "fly" you must go back to the beginning, back to your roots. You must learn the "art" from the old messages.   O

The Character of Oedipus in Oedipus and The Infernal Machine

904 words - 4 pages The Character of Oedipus in Oedipus and The Infernal Machine    The stories of Oedipus, as told through Seneca's Oedipus and Cocteau's The Infernal Machine, contain both similarites and differences. Both authors portray the character of Oedipus as being obstinate, ignorant, and inquisitive. Yet Seneca and Cocteau differ on their interpretation of the motives that propelled these characteristics of Oedipus. Seneca portrays Oedipus as a

Okonkwo's Tragic Flaws in Chinua Achebe's Things Fall Apart

3121 words - 12 pages        An increasing amount of contemporary literature traces its origins back to the early works of Greece. For ages, humans have fascinated themselves with the impossible notion of perfection. Unrealistic expectations placed on those who were thought to be the noblest or most honorable individuals have repeatedly led to disappointment and frustration, either on the part of those particular individuals or those they influence. Classic

Sophocles' Antigone - Antigone Must Challenge Creon

889 words - 4 pages Antigone Must Challenge Creon in Antigone   In his "Funeral Oration" Pericles, Athens's leader in their war with other city-states, rallies the patriotism of his people by reminding them of the things they value. He encourages a sense of duty to Athens even to the point of self-sacrifice. He glorifies the free and democratic Athenian way of life and extravagantly praises those willing to die for it. In Antigone, Creon, Thebes's leader in

The Role of Women in Homer’s Iliad

796 words - 3 pages The Role of Women in Homer’s Iliad Homer’s Iliad is undoubtedly focused on its male characters: Achilles, primarily, but also Hector and Agamemnon. Nevertheless, it seems that the most crucial characters in the epic are female. Homer uses the characters of Thetis, Andromache, and Helen as a basis for comparison to the male characters. Homer wants his audience to see and understand the folly of his male characters in choosing war over peace

A Comparison of Butler's Life and Kindred

1915 words - 8 pages A Comparison of Butler's Life and Kindred   What lies in the mind of an author as he or she begins the long task of writing a fiction novel? This question can be answered if the author's life is studied and then compared to the work itself. Octavia E. Butler's life and her novel Kindred have remarkable comparisons. This essay will point out important events of Butler's life and how they link to the mentioned novel. Octavia Estelle

Pillars of Metaphorical Ambiguity in The Scarlet Letter

1439 words - 6 pages Pillars of Metaphorical Ambiguity in The Scarlet Letter Among the multiplicity of arcane elements hidden beneath the words in Hawthorne's "The Scarlet Letter", none is so apparent, yet strikingly subtle to the reader's perception and consumption of characterization than the allegorical play on words within the names of the characters.  Both the protagonist and her rival within the plot are blessed with conveniently appropriate, fitting

Similar Essays

Community Report Of Kamirekrom

7716 words - 31 pages crops can be grown at great risk as they lead to the rapid loss of organic matter and erosion. These soils are predominant all over the district.Gleysols on the other hand are waterlogged almost throughout the year. They exhibit sometimes under a thick organic layer, a friable, light colored layer of clay that graduates into a water-impermeable stratum, where typical manganese concretions are found. The CEC is moderate and phosphor and carbon

Reality And Illusion In Shakespeare's Hamlet Reality, Appearance And Deception

896 words - 4 pages Reality and Illusion in Hamlet   Shakespeare’s play, Hamlet, begins with the appearance of a ghost, an apparition, possibly a hallucination. Thus, from the beginning, Shakespeare presents the air of uncertainty, of the unnatural, which drives the action of the play and develops in the protagonist as a struggle to clarify what only seems to be absolute and what is actually reality. Hamlet's mind, therefore, becomes the central force of the

Sub Plots In Hamlet Essay

1118 words - 4 pages Sub-plots in Hamlet   There are many things that critics say make Hamlet a "Great Work," one of which is the way that Shakespeare masterfully incorporates so many sub-plots into the story, and ties them all into the main plot of Hamlet’s revenge of his father’s murder. By the end of Act I, not only is the main plot identified, but many other sub-plots are introduced. Among the sub-plots are trust in the Ghost of King Hamlet, Fortinbras, and

Hamlet As Victim And Hero Essay

1301 words - 5 pages Hamlet as Victim and Hero      Hamlet, Prince of Denmark, a Shakespearean tragedy, tells the story of Prince Hamlet, who gained the knowledge of a terrible incident that his kingdom had suffered. Claudius, the king of Denmark and Hamlet's uncle, had killed his own brother, the king, who was also the father of Hamlet, and married his brother's widow. Hamlet suffered these traumas to a severe degree, and his only relief was to defeat his