Many cuts of beef now meet the USDA's regulations to qualify as lean or extra lean. 1  Of these, the following are considered extra lean: 2  Eye of round roast and steak. 3  Sirloin tip side steak. 4  Top round roast and steak. 5  Bottom round roast and steak. 6  Top sirloin steak.
Some varieties of Limestone are more porous than others. In general, limestone countertops are porous and vulnerable to stains. Water and soap spills need to be wiped right to prevent staining.Acid substances such as vinegar, lemon juice and ammonia will cause surface discoloration and etching.n general, limestone countertops are porous and vulnerable to stains. Water and soap spills need to be wiped right to prevent staining. Acid substances such as vinegar, lemon juice and ammonia will cause surface discoloration and etching.
The weathering of limestone: let it rain Rain and Flooding. For the past 35 million years, rainwater has endlessly and relentlessly washed across the limestone escarpment. To varying degrees, the limestone will absorb water through its pores, but stone that has been damaged by ductile deformation is much more easily infiltrated.