Treatment of hypothyroidism with levothyroxine is effective, but starting doses vary. There are two strategies for initiating levothyroxine in healthy adults younger than 65 years: low-dose (50 mcg) and full-dose (1.6 to 1.7 mcg per kg).
The only good example of this is chalk, which is made from the compacted shells of tiny marine organisms called diatoms. Other than that, animal and plant remains do not tend â¦to form rocks, although the hard parts may form fossils.
The short story is this: 1  Igneous; they form from the cooling of magma deep inside the earth. 2  Metamorphic; they are formed through the change (metamorphosis) of igneous and sedimentary rocks. 3  Sedimentary; they are formed through the solidification of sediment.