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.
Though the default programs inventory isnât specific to Internet programs, you will find Internet programs in the list. Choose from the list the program you want to use as your web browser. One example is Firefox. Choose the option Set This Program As Default. Repeat Steps 3 and 4 for your email program. Click OK. Whenever you install new Internet software, such as a new email program or web browser, it typically asks whether you want it to be the âdefault.â