A cinder cone or scoria cone is a steep conical hill of volcanic fragments that accumulate around and downwind from a volcanic vent. A cinder is a pyroclastic material Cinders are extrusive Igneous rocks Cinders are similar to Pumice, which has so many cavities and is such low-density Plate tectonics and hotspots Divergent plate boundaries At the  The rock fragments, often called cinders or scoria, are glassy and contain numerous gas bubbles "frozen" into place as magma exploded into the air and then cooled quickly. A cinder is a pyroclastic material Cinders are extrusive Igneous rocks Cinders are similar to Pumice, which has so many cavities and is such low-density Scoria is a textural term for macrovesicular Volcanic rock. It is commonly but not exclusively Basaltic or andesitic in composition Glass in the common sense refers to a Hard, Brittle, transparent Solid, such as that used for Windows many Magma (Plurals magmas and magmata) is molten rock that sometimes forms beneath the surface of the Earth (or any other Terrestrial planet  Cinder cones range in size from tens to hundreds of meters tall.  Cinder cones are made of pyroclastic material. Pyroclastic rocks or pyroclastics (derived from the Greek πῦρ, meaning fire and κλαστός, meaning broken are Clastic rocks
Many cinder cones have a bowl-shaped crater at the summit. Lava flows are usually erupted by cinder cones, either through a breach on one side of the crater or from a vent located on a flank. Lava is molten rock expelled by a Volcano during an eruption When first expelled from a volcanic vent it is a Liquid at Temperatures  If the crater is fully breached, the remaining walls form an amphitheatre or horseshoe shape around the vent. Lava rarely issues from the top (except as a fountain) because the loose, uncemented cinders are too weak to support the pressure exerted by molten rock as it rises toward the surface through the central vent. 
Cinder cones are commonly found on the flanks of shield volcanoes, stratovolcanoes, and calderas. A shield volcano is a large Volcano with shallow-sloping sides A stratovolcano, also called a composite volcano is a tall conical Volcano composed of many layers of hardened Lava, Tephra, and Volcanic A caldera is a cauldron-like volcanic feature formed by the collapse of land following a volcanic eruption  For example, geologists have identified nearly 100 cinder cones on the flanks of Mauna Kea, a shield volcano located on the Island of Hawaii. Mauna Kea is a Dormant volcano in the Hawaiian Islands, one of five volcanoes which together form the Island of Hawaii. A shield volcano is a large Volcano with shallow-sloping sides The State of Hawaii ( or həˈwaɪʔiː Hawaiian: Mokuāina o Hawaii) is a state in the United States located on an Archipelago in the  These cones are also referred to as scoria cones and cinder and spatter cones. 
Perhaps the most famous cinder cone, Paricutin, grew out of a corn field in Mexico in 1943 from a new vent. Parícutin (or Volcán de Parícutin also accented Paricutín by locals to more closely match the pronunciation of the native Purepecha name Parhicutini or spelled unaccented The United Mexican States ( or commonly Mexico (ˈmɛksɪkoʊ () is a federal constitutional Republic in North America.  Eruptions continued for 9 years, built the cone to a height of 424 meters, and produced lava flows that covered 25 km². 
The Earth's most historically active cinder cone is Cerro Negro in Nicaragua. Cerro Negro is a Volcano in the Cordillera de los Maribios mountain range in Nicaragua, about 10km from the village of Malpaisillo.  It is part of a group of four young cinder cones NW of Las Pilas volcano. Las Pilas is a Volcano located in the western part of Nicaragua.  Since it was born in 1850, it has erupted more than 20 times, most recently in 1992 and 1995.