Seafloor spreading is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge. Seafloor spreading helps explain continental drift in the theory of plate tectonics.he destruction of oceanic crust occurs at subduction zones where oceanic crust is forced under either continental crust or oceanic crust. Today, the Atlantic basin is actively spreading at the Mid-Atlantic Ridge. Only a small portion of the oceanic crust produced in the Atlantic is subducted.
April sees the weather continue to improve in Krakow, Poland, as the average temperature doubles to 8 C. The average high is 12Â°C and the average low 3Â°C, so April is the first month of the year that does not reach freezing temperatures.t is, along with May, the least humid month of the year at 70%, and there are 11 hours of sunshine per day? making it one of the sunniest months of the year. April hosts the Easter celebrations, and these include religious ceremonies and parades, along with various events being held around the Wawel Cathedral.
Pisanki (Polish painted Easter eggs), photo: Andrzej Sidor / Forum. Poland has a series of unique rituals connected to Easter, ranging from joyful to spiritual, and of course always including plenty of homemade delicacies. Easter in Poland is celebrated according to the Western Roman Catholic calendar. Easter Sunday falls on the first Sunday after the first full moon of spring. Rites and practices are therefore marked by Christianity, but still remain strongly influenced by pagan traditions.