Answer:
The Mazama ash is an example of a marker bed.
Explanation:
Marker beds are distinct strata that are found in other sites in the same region. They can give evidence to age of sediments in a new site if they’ve been assigned a date in other sites. The Mazama ash is consisted of fragments that were ejected into the air by a volcanic eruption of the Mount Mazama, from Oregon Cascades. It blew up 6900 years ago and the ashes were carried by the wind. When the ash settled, it created a marker bed.
I could be wrong but I think it would be A and D I could be wrong but give it a shot.
<span>Population in 1770 = 2,148,
100
Population in 1870 = 38,558,371
.the Louisiana Purchase, the Texas Revolution, The Spanish-American War, the War of 1812, the purchase of Alaska, the Mexican Cession, the Indian Wars, and the California Gold Rush.
lol lemi know if this helps alright XD </span>
It was the academic community who <span>mostly agreed and backed the book's scientific research and evidence. Also the public opinion backed Carson's text. On the other hand, t</span>here was strong backlash <span>from the chemical industry for book's message. </span>DuPont, Velsicol Chemical Company<span>, and the </span>American Cyanamid<span> biochemist </span>Robert White-Stevens<span> and former Cyanamid chemist </span>Thomas Jukes<span> were amongst the aggressive critics of the research especially that it was attacking the chemicals that they were producing.</span>
