What explanations have been proposed for the mass extinction at the K-T boundary? Why is a meteorite the favored theory today?
What will be an ideal response?
Among the suggested causes for the K-T mass extinction are changes in sea level, meteorite impact, volcanic eruptions, and drastic changes in surface temperature and climate. The impact of a large (~10 km) meteorite is the favored theory today because that explanation has had confirmation of a number of predictions, including the presence of a worldwide iridium anomaly, significant extinctions on the land surface and in the oceans, the presence of shock quartz, the prevalence of charcoal, the presence of sand-sized spherules, and perhaps most importantly, the discovery of a large impact basin that corresponds to the timing of the extinction.
You might also like to view...
Which of the following characterizes a liquid state of matter?
A. Atoms are held together, but weakly enough that the material is mobile and can change shape. B. Atoms are packed together with a relatively fixed shape. C. The material retains its shape and volume unless deformed, dissolved, or perturbed in some other way. D. Atoms are poorly connected and can expand to fill the available volume.
Religions with strong territorial and cultural group identification, such as Japanese Shinto, are known as:
A) universalizing religions B) tribal religions C) ethnic religions D) traditional religions
The Grenville orogeny was the culminating event of the amalgamation of Laurentia. Indicate whether the statement is true or false
Almost 2/3 of Russians live in an environment harmful to their health
Indicate whether the statement is true or false