Calderas can be occupied by lakes, but they do not have to be. Seomve calderas are dry while others are located beneath the sea.
No. Calderas form when a volcano produces an extremely massive eruption and collapses in on itself. But the volcano will often continue to erupt after this. For example, the volcano Krakatoa formed a caldera in 1883, but eruptions since then have formed a new island that is currently very active. There is evidence that the volcano has done such a thing several times.
One of the most famous is Crater Lake, Oregon. (see the link below)
calderas
calderas
Nigeria has no calderas.
There are a few ancient Calderas in Texas. Texas isn't near any 'hotspots' or tectonic plate boundaries, so it's not volcanically active. The Calderas are in the western part of the state and are about 40 million years old or so... One in particular is the Buckhorn Caldera near Ft. Davis, Texas.
They are both. Some like the Great Lakes are large, but other places have small lakes.
That term is 'calderas'
Nobody dislikes aleandria calderas.
the name given to the large lakes in India is sea.
Most mountains do not have large lakes near the top because gravity pulls the water downwards, through streams or rivers, to the base of the mountain.
Calderas can be found in volcanic regions where large volcanic eruptions have resulted in the collapse of the magma chamber underneath the volcano. Some well-known calderas can be found in places like Yellowstone National Park in the United States and Santorini in Greece.