The KT boundary consists of a lower layer of sedimentary rock creamy
Question 1
The KT boundary consists of a lower layer of sedimentary rock creamy with a wide variety of marine fossils, a centimeter thick layer of claystone devoid of minerals, and an upper layer of sedimentary rock containing a much-reduced variety of marine fossils. As a result of these, the question he asked was; why the sudden reduction in marine fossils? (pg.2).
Question 2
He came up with iridium as a replacement for beryllium, which is incredibly rare in the earth’s crust but is more prevalent in meteorites and meteorite dust. The results he expected was that more concentrated iridium would have implied slower deposition and less iridium would have suggested rapid removal and sudden KT transition.
Question 3
They found more iridium than what they had expected based on their hypothesis, and even more on the than contained in the other stratigraphic layer. The interpretation was that there was something unusual going on at the time the clay layer was deposited. The data did not support their original hypothesis, so they began having more questions. As a result of the first iridium test, Alvarez started digging through published geological studies.
Question 4
Since supernova had occurred, it would have released plutonium-244, which would have accumulated alongside the iridium at the KT boundary. The possibility of supernova discovery would make worldwide headlines. The experiment did not support their hypothesis since the first sample was contaminated. The orange arrow does a loop-d-loop twice through the gathering data circle since they kept coming up with a new theory.
Question 5
That a considerable asteroid struck the earth at the end of the cretaceous and blown millions of tons of dust into the atmosphere, the expected results were that the soil had blotted the sun and stopped photosynthesis and plant growth hence causing a global collapse of the food web. Yes, the observations match the results.
Question 6
In the next ten years, more than 2000 scientific papers are put out on the topic, bringing new pieces of evidence and new ideas to the table.
Question 7
The tsunami debris, which supports the asteroid hypothesis.By suggesting that if a giant asteroid struck the ocean would cause a tsunami and get sediments from the bottom and dispose of them elsewhere. Glass evidence does not support the asteroid hypothesis since it suggests that if a had struck the earth, it would generate a lot of heat and melt all the rocks into glass and glass particles.
Question 8
It is not the end of the story since new ideas keep coming to the table, and we cannot be 100% sure about what happened to dinosaurs since creatures like birds and others survived the extinction.