The phrase "a massive core" is correct and usable in written English.
It can be used in contexts discussing something with a large central part, such as in science, literature, or metaphorical expressions.
Example: "The planet's formation was influenced by a massive core that generated intense gravitational forces."
Alternatives: "a large nucleus" or "a substantial center".
In contrast, Unit II is formed by thick simple rubbly lavas, characterized by a massive core and a brecciated/rubbly top.
Generally, if there is a lot of energy with a massive core at the center of a galaxy, the core is probably a black hole.
The internal structure follows the characteristics for lava lobe morphology in general, with an upper vesicular crust forming half to one third of the total thickness, a massive core with abundant vesicle cylinders, and a thin basal vesicular crust.
Our understanding nowadays of cell-wall architecture amounts to a massive "core" comprised of peptidoglycan covalently attached via a linker unit (l-Rha d-GlcNAc-P) to a l-Rha d-GlcNAc-Pran, in turn attached to several-Rha d-GlcNAc-Pighl-Rha d-GlcNAc-Pinofuran, in torn attached to mycolinearids.
(One of the goals of NASA's Juno spacecraft, which arrived at Jupiter earlier this month, is to see whether the planet really does have a massive core). .
The planet most likely does not have a massive core of iron but is rich in light elements like oxygen, calcium and aluminum.
Inside, a massive hollow core made of steel and/or concrete contains many of the services: elevators, stairwells, and bathrooms.
The integration of morphology, radar wave velocity, and internal stratigraphy allowed us to identify the main structural units of the rock glacier as well as to explain its genesis: the rock glacier was formed by the imbrication of a massive ice core, originating from the retreat of the former Thabor glacier since the LIA, into pre-existing glacial deposits.
For a massive dense core this region can take up a fourth of the total system size.
This model shows that a direct mapping from cores to stars is the natural physical outcome of massive core evolution, and thereby allows us to explain many of the properties of young star clusters as direct imprints of their gas-phase progenitors.
The magnetic moments of nucleons lead to the massive core in baryons.
