Then, magma upwelling at the Mid-Atlantic Ridge began to produce oceanic crust, parting the continents to form the Atlantic Ocean. Today the Mid-Atlantic Ridge snakes down the center of the Atlantic all the way from Iceland to the Antarctic Plate and remains an active site of sea-floor spreading..
Most calves are weaned between 120 and 290 days (3 to 10 months) after birth, but most producers like to wean their calves when they're around 205 (6 months) of age.Weight is also a factor, with the minimum being generally around 132lb (60kg). This will only add to the stress of the calves during weaning time. 2  Beware of the likely reaction of the first-calf heifers. 3  They will crawl the fence if you do not make it escape proof with a couple of strands of hot electric wire or steel panels.
Calves can be ready for weaning by 3 to 4 weeks of age; however, in Penn State studies calves weaned at 3 weeks required extra attention. The increased time and labor required to get these calves eating starter suggest that waiting until 4 weeks of age would be prudent.n two experiments, 124 male and female calves were weaned at 3, 4, 5, or 6 weeks of age and studied through 8 weeks of age. Milk replacer for this study contained 22 percent protein and 15 percent fat and was fed at 10 percent of birth weight.