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.
You can also set the default browser through the Control Panel. Open the Start menu, type 'Default programs', hit enter and click 'Set your default programs' in the window that appears. Click your browser in the list on the left and then click 'Set this program default' on the right.You can also choose which file types and protocols that browser opens by default.pen the Start menu, type 'Default programs', hit enter and click 'Set your default programs' in the window that appears. Click your browser in the list on the left and then click 'Set this program default' on the right. You can also choose which file types and protocols that browser opens by default.