Chemical andsedimentary processes in acidic salinelakes andtheir Research Paper

Chemical andsedimentary processes in acidic salinelakes andtheir significancefor Martiangeology - Research Paper Example Rover missions sent to Mars and consequent investigations of the evidence found from the planet, have revealed extensive geochemical evidence regarding the presence of standing bodies of water early in the history of Mars. Geochemical archives in lake sediments provide information that aligns with the geological features of Mars. Various acidic saline lakes in Australia, the United States and other countries are analogous with the rocks and soil qualities of planet Mars. The conditions of regional acid saline lakes will be discussed, and terrestrial hematite concretions will be compared with those found on earth. Amino acids are the key to terrestrial biochemistry, widely prevalent in terrestrial life, and easlily identified by means of advanced instruments and technology. For this reason, amino acids are ideal as a biomolecular class, to use for planetary exploration. How chemical biosignatures in amino acids can help to indicate life in Mars will be examined. Introduction â€Å"Un derstanding lake chemistry is critical for correctly interpreting the geochemical archives of lake deposits† (Cohen 69). The presence of elements and isotopes in lakes are closely associated with external climatic and watershed processes. The concentrations of solutes determine the distribution of organisms, and the precipitation or dissolution of mineral phases. Sedimentary archives develop from both fossils and minerals, and interpreting aspects of ancient water chemistry from these records may enable the reconstruction of paleoclimate or activity prior to the presence of human life around the lake. Similarly, the interpretation of isotopic records require a preliminary understanding of their behavior in lakes, and its relationship with external factors such as rainfall or nutrient discharge. Paleolimnology is the study of past conditions or processes of ancient lakes, and of the sediments and history of existing lakes It is recognized that lakes probably existed on Mars and on other planets of the solar system. This invites the next generation of paleolimnologists with tremendous opportunities â€Å"to apply terrestrially gained knowledge of how ‘small’ water bodies record their histories through their sedimentary records† (Cohen 398). Planetary geologists would require the paleolimnological literature to help them interpret these records. However, geologists should be proactive in suggesting the ways in which such deposits should be explored. They are also required to devise analog studies of lake histories from extreme terrestrial environments that replicate those of other planets like Mars. Research that specifically target lakes increase the signals of interest, providing the most highly resolved temporal records possible. Rapid advances in the accuracy of dating lake sediments is expected to play a critical role in advancing paleolimnology, permitting an increasing refinement in the interpretation of time series data and to us e those data to test quantitative model predictions. Cohen (p.398) asserts that the swiftly developing field of paleolimnology works towards making exciting discoveries. Thesis Statement: The purpose of this paper is to investigate chemical and sedimentary processes in acidic saline lakes and their significance for Martian geology. Evidence of the Presence of Water in the Early History of Mars â€Å"

Last Essay Example | Topics and Well Written Essays - 750 words

Last - Essay Example argument that they had the same constitutional rights and standing as biological parents, ruling that the application of the â€Å"Existing Indian family exception† did not apply in the said case. The ruling on this case has two major implications. First, Brewer, according to the words of Barbara Atwood, notes that it scraps the ‘Existing Indian Family’ exception, one that has always been a cause of disagreement within the Californian Courts. Secondly, the ruling also discards the constitutional issues brought forward by the foster couple in favor of their argument. This ruling signals a predisposition of the nation towards rejecting Existing Indian Family exception. To answer the questions, in the event that the court rules against John E, he will still be obliged to provide child support to Baby A. According to the principles underlining guidelines formation, both parents should share the legal responsibility of their children, and John is no exception here. Secondly, the Child Support Recovery Act of 1992 and the Deadbeat Parents Punishment Act of 1998 can both be used to compel John towards providing support to the child. Furthermore, paternity tests did show that he is the father to the child, and thus he must take the full responsibility. However for the mother to Baby A, this far little has been heard about her, but in the event that she shows up, and given that she is a well-known drug addict, her fitness must be confirmed before she can be allowed near the child. If the tests prove her fit, the she should be allowed access to the baby, but not custody. The bonding the child has created with the caretakers is healthy enough at this point , and disrupting it by allowing the mother to have her might be detrimental to her wellbeing. In the case of Stanley v Illinois, the initial ruling had some inadequacies. The argument that the bond between a mother and a child is often stronger than that between a father and a child was sound; however, in the event