Topic: Discussion 3 (Beac X C Secure https//filearn.laccd.edu/courses/48546/disc

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Topic: Discussion 3 (Beac X C Secure https//filearn.laccd.edu/courses/48546/discussion topics/392413 Apps Tech Support Exclus G Google DISCUSSIon 3Tbeacn seaimenty Discussions Syllabus Modules MyLab and n this discussion, you will choose your favorite beach, or a beach anywhere in the world that you would like to visit. You will do a little research, and describe and interpret the sediment found on that beach. Directions 1. First, review all content items in this module, including reading the assigned textbook chapter and ount Mastering NetTutor ConferZoom Library Chat Office 365 revi ewing the accompanying lesson slides and multimedia resources. Then, complete your Chapter 7 Mastering Geology assignment. board 2. After familiarizing yourself with the various types of sediment, you are going to pick your favorite beach, or a beach anywhere in the world that you would like to travel to. Where is it? Do a little research. Find photos of the beach that show the sediment found on the beach. Note that the sediment can be any size: sand, gravel, pebbles, cobbles, or boulders, depending on the source of the sediment and how far the sediment has traveled from its source. urses endar 3. (4 points) In your new reply to this discussion forum using college-level writing, you are going to share with the class: 1) a photo of the sediment on your favorite beach: and 2) your interpretation of the sediment on "your" beach. Items to include in your interpretation: box o A detailed description of the sediment is it biogenous (organically derived) or lithogenous (weathered rock)? If lithogenous, what is its mineral composition (For example, Quartz? Olivine? Basalt?). grain size How do you know? If biogenous, what is it made of? (Broken shells? Weathered coral?) materiai for the sediment? (For example, Granite? Basalt? Shells due to warm waters and high biological lelp (well sorted or poorly sorted?) and rounding (well rounded or angular)? Is the sediment mature? o An interpretation of how and why this particular sediment is found on this beach. What is the source productivity?) e What led you to choose this beach. What do you like about this particular beach and its sediment? o Due 11pm PST Thursday. 4. After posting your sediment, you will be able to view nur classmat

Explanation / Answer

I am very much interested in island beaches of Hawaii. As these beaches are unique where all varieties of sands with different textures are found, I am interested in these beaches. According to photos I have explored of these beach sands, I have found sediments extending from gravel to sand. Here in these sediments I couldn't observe much of quartz, which is abundant in all other beaches. Reason for this is those islands in Hawaii are submarine volcanic origin having poor composition of quartz. But these sediments are in white color which might have been occurred due to rich carbonate sediments around these island beaches. So the sediments in the beach are origin of both biogenous and lithogenous. Biogenous sediments are due to coral reefs surrounding the islands composing calcium carbonate. Lithogenous sediments are mostly basaltic as these are due to submarine volcanism. These sediments are having rich plagioclase feldspar. Biogenous sediments are eroded and deposited in the beach by mechanical erosion and bioerosion. Bioerosion due to parrot fish and mechanical erosion is due to waves. There are some red sand beaches here due to explosion of cindercones having higher aluminum content. Finer sands are due to large transportation and carbonate sediments. Coarser sands in the beach are due to short transportation distances like erosion of volcanic rocks in the mountains adjacent to beaches.

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