Intrusive igneous rocks include gabbro, granite, and diorite. Each rock differs in that it was created by a separate silica-containing magma.
Despite having different silica concentrations, granite, diorite, and gabbro are all products of magmas. Gabbro is a typical rock that contains 45% to 55% silica. With a silica content ranging from 55% to 65%, diorite is a middle-ground rock. With a silica concentration of more than 65%, granite is an acidic rock.
The most common elements in the Earth's crust, silicon and oxygen, are combined to form silica, also known as silicon dioxide (SiO 2). Silica, which makes up the majority of more than 95 percent of all known rocks, makes up 59 percent of the Earth's crust. Quartz, which is by far the most prevalent crystalline variety of silica, tridymite, and cristobalite are the other two.
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Answer:
The Land Ordinance of 1785 (laws passed by the Continental and Confederation Congresses are called ordinances) and the resulting North West Ordinance of 1787 are the most long lasting as they provided for the disposition of public lands and procedures for organizing territorial governments in the lands west of the Appalachian Mountains.
Answer:
triangular trading routes
Explanation:
Because the 2nd one is in Spain, the 3rd one should be in north America, and the 4th one is also in North America in the 13 colonies.
