Another theory is that some is juvenile water, released from molten rock deep within the Earth's crust, often during volcanic eruptions.

Within the same context the release of juvenile water tied up in fossil fuels like coal, lignite, gas and petrol is generally overlooked.

Non-meteoric forms of groundwater are connate water and magmatic water, also termed juvenile water.

I daresay you've drunk from the deep springs, with their juvenile water, as well as from the shallower fountains and the brooks of melted snow.

Nestlings and smaller juvenile water dragons are vulnerable to predation by kookaburras, currawongs, butcherbirds and other carnivorous birds.

Magmatic water or juvenile water is water that exists within, and in equilibrium with, a magma or water-rich volatile fluids that are derived from a magma.

In fact, much so-called juvenile water is probably either rainwater that has circulated to great depths, or water that was trapped in rocks that have been carried down at subduction zones (see Inside Science, No. 6, 23 February 1988).