Lab #4 Age Dating: Geologic Time Name: ___________________________________________________ Question A 1. Youngest_____ XXXXXXXXXX______ Oldest _______ 2. Youngest_____ XXXXXXXXXX______ Oldest _______...

I will attach the file with the questions that need answered. I don't need MLA style, it just made me pick one. I just need answers to all questions on attached sheet for Geology


Lab #4 Age Dating: Geologic Time Name: ___________________________________________________ Question A 1. Youngest_____ ______ Oldest _______ 2. Youngest_____ ______ Oldest _______ 3. Youngest_____ ______ Oldest _______ Question B Letters A - O 1. ________________ Youngest 2. ________________ 3. ________________ 4. ________________ 5. ________________ 6. ________________ 7. ________________ 8. ________________ 9. ________________ 10. ________________ 11. ________________ 12. ________________ 13. ________________ 14. ________________ 15. ________________ Oldest Question C Letters H – Q 1. ________________ Youngest 2. ________________ 3. ________________ 4. ________________ 5. ________________ 6. ________________ 7. ________________ 8. ________________ 9. ________________ 10. ________________ Oldest Question D 1. __________________Youngest 2. __________________ 3. __________________ 4. __________________ 5. __________________ 6. __________________ 7. __________________ 8. __________________ 9. __________________ Oldest YOUNGEST 1 ________ 2 ________ 3 ________ 4 ________ 5 ________ 6 ________ 7 ________ 8 ________ 9 ________ 10 _______ 11 _______ 12 _______ 13 _______ 14 _______ 15 _______ OLDEST Question E Name Each Type of Unconformity Question F Type of Unconformity: ____________________ Question G Type of Unconformity: ____________________ Question H Type of Unconformity: ____________________ Radiometric Carbon-14 Age Dating You have been asked to date the lobes of the Mississippi River. The Lobes are shown on the diagram below. There have been wood samples and shells obtained with the following carbon-14 radioactivity. 3 LaFouche 2 Techa 1 Maringouin 4 Plaquemines 5 St Bernard Lobe 1 – Maringouin; from 5 to 8 cts/min/gmC Lobe 2 – Techa; from 7.8 to 13 cts/min/gmC Question I Lobe 3 – LaFouche; from 9.5 to 15 cts/min/gmC Lobe 4 – Plaquemines; from 15.3 to 17 cts/min/gmC Lobe 5 – St. Bernard; from 6 to 12 cts/min/gmC · Use the graph on next page to obtain the ages · List the Lobes in order from youngest at top to oldest at bottom and then give their age ranges · Note there is overlap in their ages Order of Age (Y to Old) From To IA. The half-life of plutonium-239 is 24,300 years. If a nuclear bomb released 8 kg of this isotope, how many years would pass before the amount is reduced to 1 kg? IB. The half-life of radon-222 is 3.8 days. How much of a 100 gram sample is left after 15.2 days? Fossil Assemblages Question J · The letters by the pictures correspond to the rock specimen · You need to identify more than one index fossil for each assemblage or picture Rock Specimen A – from New York State A. What index fossils are present (you will need more than one)? B. Based on the overlap of ranges for these index fossils what is the age of the rock in Geologic periods (expressed as early, middle, late part of one or more periods) C. Based on the overlap what is the age (in millions of years, mya) of the rock specimen Rock Specimen B – from Ohio D. What index fossils are present (you will need more than one)? E. Based on the overlap of ranges for these index fossils what is the age of the rock in Geologic periods (expressed as early, middle, late part of one or more periods) F. Based on the overlap what is the age (in millions of years, mya) of the rock specimen Rock Specimen C – from Delaware G. What index fossils are present (you will need more than one)? H. Based on the overlap of ranges for these index fossils what is the age of the rock in Geologic periods (expressed as early, middle, late part of one or more periods) I. Based on the overlap what is the age (in millions of years, mya) of the rock specimen The convoluted sutures are easy to see in this fossil fragment of the genus Baculities, from the beacher Island Shale Member of the Pierre Shale in Cheyenne County, Kansas. Question K C14 Age Dating CTS/min/Gm123456911131520151311.29.70000000000000118.20000000000000117.14.90000000000000043.72.821.2Age(Thousands of Years) Radioactivity (Cts/min/gm carbon) 15