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.
Change the Default Web Browser in macOS. To change your Macâs default Web browser, first log into your user account and launch System Preferences. When the System Preferences window appears, click on General. In the General preference pane, youâll see an option labeled Default web browser. By default, this will be set to Safari.