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The principle of faunal succession, also known as the law of faunal succession, is based on the observation that sedimentary rock strata contain fossilized flora and fauna, and that these fossils succeed each other vertically in a specific, reliable order that can be identified over wide horizontal distances.A fossilized Neanderthal bone will never be found in the same stratum as a fossilized Megalosaurus, for example, because neanderthals and megalosaurs lived during different geological periods, separated by many millions of years.Unfortunately no information ever escapes from beyond the event horizon.
This principle, which received its name from the English geologist William Smith, is of great importance in determining the relative age of rocks and strata.
It’s not used/taught/believed merely because it’s pretty, but because it works.
Importantly, the curvature described isn’t merely dependent on the presence of “stuff”, but on the curvature of the spacetime nearby.
The short answer is that gravity isn’t “emitted” by matter.
Instead, it’s a property of the spacetime near matter and energy.Even if that object collapses into a black hole, the gravity field around it stays about the same; the shape of the spacetime is stable and perfectly happy to stay the way it is, even when the matter that originally gave rise to it is doing goofy stuff like being a black hole.