operation of the Medtronic Tono-Pen XL Tonometer. Th e Medtronic Tono-Pen XL is a precision electronic tonometer which measures intraocular pressure (IOP). Th e body of the instrument is specially designed to ï¬ t comfortably in the userâs hand, facilitating fast and accurate measurements. Th e stainless steel probe on the Tono-Pen XL contains a
Metamorphic rocks fall into two major categories: foliated metamorphic sedimentary rocks non-foliated metamorphic rocks. Refer to Metamorphic Rock Photos for more visual examples of each of these metamorphic rock types. Foliated (Layered) Metamorphic Rocks 1. slate Slate is metamorphosed shale.Slate is tougher than shale and it breaks into thin, flat layers.Slate is usually dark gray, but it can also be red colored.efer to Metamorphic Rock Photos for more visual examples of each of these metamorphic rock types. Foliated (Layered) Metamorphic Rocks 1. slate Slate is metamorphosed shale. Slate is tougher than shale and it breaks into thin, flat layers. Slate is usually dark gray, but it can also be red colored.
Metamorphic rocks are formed from a protolith, or parent rock, which can be of any rock type (igneous, sedimentary, or metamorphic). The parent rock is exposed to varying degrees of pressure and/or heat either from depth of burial, exposure to a plutonic body of intense heat, or from pressures resulâ¦.