Final answer:
Kerogen is transformed into shale oil through heating and pressure. The approximate temperature range for this transformation is between 300 to 500 degrees Fahrenheit.
Step-by-step explanation:
In the process of heating and applying pressure, kerogen is transformed into shale oil. The exact temperature at which this transformation occurs depends on various factors including the type and composition of the kerogen and the duration of heating. However, an estimated temperature range for the transformation of kerogen into shale oil is typically between 300 to 500 degrees Fahrenheit.