A dyke (or dike) in geology is a type of later vertical rock between older layers of rock. Technically, it is any geologic body which cuts across:1  flat wall rock structures, such as bedding. dyke (or dike) in geology is a type of later vertical rock between older layers of rock. Technically, it is any geologic body which cuts across: 1  flat wall rock structures, such as bedding.
Another example would be the âdefault browserâ on your computer. Windows PCs come with Internet Explorer (the blue âEâ icon) as the default browser, just as Apple includes their own Safari browser as the default on their Mac computers.
Thereâs no need to go through the preceding set of steps. 1  Internet Explorer is the preferred web browser in Windows. 2  Some programs, such as Internet Explorer, incessantly ask whether you want them to be the defaults every dang doodle time they run, even after you specify another program as the default.