Writing a Paragraph

Hydrothermal dolomite is generally interpreted to
have formed as a result of hot fluids related to hydrothermal
activity and/or burial alteration of limestones.
Many of these dolomites are known to host major
reserves of hydrocarbons, and many are also associated
with Mississippi Valley Type (MVT) Pb-Zn ore
deposits (Machel and Mountjoy, 1986; Leach and
Sangster, 1993). The Devonian and Mississippian
carbonates of Western Canada Sedimentary Basin yield
ca. 47% of the Basin's marketable gas reserves and ca.
69% of recoverable oil reserves. In these carbonates,
dolomitization, and in particular hydrothermal dolomitization,
plays a major role in the evolution of reservoir
porosity.