Jones and Cassidy went on to play mother and son on The Partridge Family, which debuted in the fall of 1970. Danny Bonaduce and Susan Dey were also key members of the cast.
Sour crude oil. Sour crude oil is crude oil containing a high amount of the impurity sulfur. It is common to find crude oil containing some impurities. When the total sulfur level in the oil is more than 0.5% the oil is called sour.
There is no debate that U.S. shales produce predominantly light sweet grades. Those are premium grades that are easier to process than heavy sour grades (and cleaner in terms of environmental impact). Shale oil's value is reflected in the solid pricing these crudes receive in the global market. Claims that U.S. production mix is getting increasingly skewed towards super-light and ultra-light grades are not supported by the production data for the last three years.