Sea floor spreading (where new material appears at seams on the sea floor and seems to have moved and is moving to either side) can be used by those who are interested in the Expanding Earth theory, as evidence of the Earth growing in the past or even now.
Tectonic plate subduction is a relatively new Geology theory and was (is) still a bit controversial or seems to have some doubters even in the established world of Geology. A couple of questions about plate subduction are do we have enough physical evidence to back it up, have we been able to monitor it long enough to confirm it?
Why do the strips of new material at mid ocean ridges have alternating magnetic polarity?
Growing Earth evidence?
Below are some links or articles about new sea floor spreading or subduction zones evidence. Or is it evidence of a Growing Earth?
Unlike continental crust, oceanic crust is actively being created at the various mid-oceanic ridges. At the mid-ocean ridges, magma erupts onto the ocean floor in centrally located rift zones.
The newly added rock then horizontally pushes previously created ocean crust away from the rift in a conveyor belt fashion. Because of this process, we find that the age of oceanic crust increases as we move away from the rift zone.
Previously unseen features in the map include newly exposed continental connections across South America and Africa, and new evidence for seafloor spreading ridges at the Gulf of Mexico that were active 150 million years ago and are now buried by mile-thick layers of sediment.
New Map Exposes Previously Unseen Details of Seafloor
Subduction of mid-ocean ridges is a common feature in recent convergent margins, but is rarely documented in Proterozoic to Paleozoic orogenic belts. Here we describe evidence for ridge-trench interaction in the deeply eroded late Neoproterozoic Damara orogenic belt, central Namibia.
Fingerprints of late Neoproterozoic ridge subduction in the Pan–African Damara belt, Namibia
Subduction, spreading or expanding on other planets and moons?
"We think this whole province was pulling away from the moon around it and that would cause the extension to make the rift valleys."
Rift valleys rewrite moon’s fiery history
Jupiter’s icy moon Europa has one of the youngest planetary surfaces in the Solar System, implying rapid recycling by some mechanism. Despite ubiquitous extension and creation of new surface area at dilational bands that resemble terrestrial mid-ocean spreading zones, there is little evidence of large-scale contraction to balance the observed extension or to recycle ageing terrains. We address this enigma by presenting several lines of evidence that subduction may be recycling surface material into the interior of Europa’s ice shell.
Evidence for subduction in the ice shell of Europa