Cylindrical is the right answer
b. stratovolcano
c. shield volcano
B. Stratovolcano
because is contains more than one substance like hardened lava, ash and tephra.
b. thickness of rock layers.
c. fossil tree rings.
d. plant pollens.
Answer:
Ice cores
Explanation:
Back in the Cretaceous era, the East Coast was covered with massive ferns, flowers, and unusual fruit trees. Many have long since become extinct or evolved into modern species. But with the help of scientists, such as Dr. James Mickle, knowledge of those plants is starting to be unearthed, providing a window into that primordial era.
In 1971, one of Mickle's colleagues from Texas was digging in the quarry when he found a well-preserved fossil of Leptocycas gracilis, a variety of sago palm that is now extinct. This specimen is the only one found intact, making it an important find in paleobotany.
This plant was similar to sago palms found today, but it was much taller and thinner, a fact that puzzles Mickle and other scientists. It's like finding a fossil of a human ancestor who was 12 feet tall. It's not clear why the palms shrank so much as they evolved.
Mickle's studies show that many of the plants that grew (in North Carolina) in the Cretaceous period are similar to species now found in the tropical climate of the southern hemisphere. This indicates that North Carolina's climate was much hotter in the past, but it is not clear why and how the cooling occurred. "Right now, we're in one of the coldest periods in Earth's history," Mickle said.
By examining the fossil record, Mickle and other paleobotanists have learned that the Earth's climate has changed drastically, with the Triassic period being hot and dry, and the Cretaceous period being cooler and wetter.
The formation of igneous rock is not a function of soil. The correct option is B.
Although the weathering of rocks can have an impact on soil formation, soil is not directly responsible for this process. Rocks undergo physical and chemical weathering, organic matter builds up, and living things act over extended periods of time to create soil.
Different soil horizons and profiles with unique qualities are created as a result of this process. However, igneous rock creation is a geological process that involves cooling and solidifying liquid magma or lava rather than being a result of soil.
Learn more about igneous rock here:
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Formation of igneous rock
Hope this helps!
The answer is B. Make it possible for foreign-owned factories to import components for assembly without customs duties.
Mexico’s Maquiladora program was started in the 1960’s. This program was initially set up the Mexican government to attract foreign companies to start their manufacturing in Mexico. It later emerged that the program wanted to attract foreign businesses, and to do so, the program offered tax benefits on imported goods that were used for their manufacturing process. Until today, assembly components, production equipment, and materials, under this program, are allowed to enter Mexico duty-free.