e lines of equal elevationsa 27. A is a vertical (or near vertical) intrusive ig
ID: 288158 • Letter: E
Question
e lines of equal elevationsa 27. A is a vertical (or near vertical) intrusive igneous body that is discordant (cuts across) with the rock units surrounding it. -28. What is the main difference between rhyolite and gr 29. List three of the four criteria, which must be met in order for a substance to be classified as a mineral. 30. 31. 32. A large, irregularly shaped, discordant pluton is called a 33. What is the actual rock name for volcanic glass? (2 possible answers) 34. Using the PLS (public land survey) method of locating places or features on a topographic map, what is the name of the numbered squares that cover one square mile each (what are they called?)? 35. What is the chemical formula of the silicate molecule? does not belong with the others? t margin c island arrExplanation / Answer
26. On a topographic map, the lines of equal elevations are called contours.
27. A dike is a vertical / sub-vertical igneous intrusive body that is discordant (cuts across) with the rock units surrounding it.
28. Rhyolite is an extrusive, volcanic rock. Granite is an intrusive, plutonic rock
29. The three of the criteria that must be met in order for a substance to be classified as a mineral are:
1. The substance must be natural
2. The substance must be a solid
3. That substance must have a definite chemical composition or a definite range of chemical composition
32. A large, irregularly, shaped discordant pluton is called a batholith.
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