If you are using the term 'upper crust' euphemistically and not to refer to bread or pies, then the upper crust is made of aristocrats. If you mean the upper part of the earth's crust, then it is made of the lightest elements from which the planet is made (silicon, aluminum etc).
Tectonic plates are formed from the lithosphere which is the solid brittle portion of the upper mantle and the crust so tectonic plates are part of both the crust and the upper brittle mantle.
Earth's crust and brittle upper mantle is called the lithosphere.
the Lithosphere or Lithospheric Plates
Lithosphere.
lithenosphere
Tectonic plates are formed from the lithosphere which is the solid brittle portion of the upper mantle and the crust so tectonic plates are part of both the crust and the upper brittle mantle.
the lithosphere
The rigid layer that is the upper mantle and crust is called the lithosphere.
Both the crust and the upper mantle are solid layers of the Earth's lithosphere. However, the crust is more brittle and less dense than the mantle. Additionally, the crust is composed primarily of oxygen and silicon (silicate minerals) whereas the mantle contains more iron and magnesium.
The term for Earth's crust and part of the upper mantle is lithosphere. The lithosphere is the rigid outer layer of the Earth that is made up of the crust and the uppermost part of the mantle. It is divided into tectonic plates that are constantly moving and interacting with each other.
Earth's crust and brittle upper mantle is called the lithosphere.
The The crust and the uppermost layer of the mantle form the lithosphere. The asthenosphere, which is still in the upper mantle, is the next layer down.
The solid portion of the upper mantle which behaves as a brittle solid is known as the lithospheric mantle. This part of the upper mantle along with the crust forms tectonic plates.
lithosphere
Lithosphere.
the Lithosphere or Lithospheric Plates
crust and part of the upper mantle