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.
Answer:
18. What Progressive issue, mainly emphasized by Theodore Roosevelt, is illustrated in the image below?
A. Banking reform
B. Tariff reform
C. Monopolies
D. Conservation
Explanation:
U.S. Labor union did not allow Chinese immigrants to become members.
<u>Explanation:</u>
Labor unions in the United States are organizations that are formed by workers from various industries that are recognized under "<u>US labor law</u>". Labor union opposed immigrants because they thought that the American workers will be undermined.
In the 1850’s, Chinese immigrants established Chinatowns in cities mainly on the western coast of the United States as U.S. Labor union did not allow Chinese immigrants to become members. In 1882, American government passed “Chinese Exclusion Act” to stop Chinese immigrants from becoming American citizens.
