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← GeographyWhich outcome occurs when shield volcano lava's viscosity increases?
A)Formation of steep stratovolcano cones✓
B)Gentle, broad lava flow plains
C)Increased effusive eruption frequency
D)Decreased gas content within lava
💡 Explanation
Steeper cones occur; **viscosity increases resistance to flow**, therefore lava piles up rather than spreading because frictional forces overcome gravitational forces, unlike low-viscosity lava which produces extensive lava plains.
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