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.
Changing Default Browser in Mac OS X Yosemite. Mac OS X is one of the leading operating systems; it is quite handy and is having very easy setup. Mac OS X had an annoying issue in its earlier versions regarding default Browser Settings. Safari was the default browser provided in Mac OS X right from the beginning.