Question: The London Hammer is considered what type of artifact?
Context: A ball-peen (also spelled ball-pein) hammer, also known as a machinist's hammer, is a type of peening hammer used in metalworking.  It is distinguished from a cross-peen hammer, diagonal-peen hammer, point-peen hammer, or chisel-peen hammer by having a hemispherical head.  It is commonly used as a tool for metalworking. An out-of-place artifact (OOPArt) is an artifact of historical, archaeological, or paleontological interest found in an unusual context, that challenges conventional historical chronology by being "too advanced" for the level of civilization that existed at the time, or showing "human presence" before humans were known to exist. A bec de corbin is a type of pole weapon and war hammer that was popular in medieval Europe.  The name is Old French for "raven's beak" or "beak of the crow".  Similar to the Lucerne hammer, it consists of a modified hammer's head and spike mounted atop a long pole.  Unlike the Lucerne hammer, the bec de corbin was used primarily with the 'beak' or fluke to attack instead of the hammer head.  The hammer face balancing the beak was often blunt instead of the multi-pronged Lucerne, and the beak tended to be stouter; better designed for tearing into thinner plate armor, chainmail or padded jacks .  Also, the spike mounted on the top of head was not nearly as long and thin as in the Lucerne.  Bec de corbin occasionally becomes a catchall for any type of warhammer, such as a maul or a horseman's pick. Hafting is a process by which an artifact, often bone, metal, or stone, is attached to a "haft" (handle or strap).  This makes the artifact more useful by allowing it to be shot (arrow), thrown (spear), or used with more effective leverage (axe or hammer).  When constructed properly, hafting can tremendously improve a weapon's damage and range.  It is estimated that hafted weapons were most common during the Upper Paleolithic and Middle Paleolithic.  Hafting was a significant milestone in the history of technology.  It was one of the first tools where hominins took separate elements and united them into a single tool increasing the efficiency and use of it.  The development of hafting was considered a significant milestone of humans by archaeologists.  It was not only a significant improvement in the technology at the time but archaeologists also believe that hafting shows the progression and development of the human mind and shows the path toward a world of complex tool making of the past.  The idea of assembling two different kinds of materials into one object that improves the functioning of the tool overall shows the mental capacity of the people of that time and gives archaeologist a better understanding of the progression of human life. In educational psychology , a learning artifact (or educational artifact) is an object created by students during the course of instruction.  To be considered an artifact, an object needs to be lasting, durable, public, and materially present.  Under the constructionist theory of educational psychology, the concept of making knowledge visible is a central component.  The creation of material artifacts is a technique used to allow students to display their knowledge in a public forum (usually the classroom).  Artifacts can be in the form of paintings, drawings, sculptures, models, or anything else that is not erased after completion. Post-excavation analysis constitutes processes that are used to study archaeological materials after an excavation is completed.  Since the advent of "New Archaeology" in the 1960s, the use of scientific techniques in archaeology has grown in importance.  This trend is directly reflected in the increasing application of the scientific method to post-excavation analysis.  The first step in post-excavation analysis should be to determine what one is trying to find out and what techniques can be used to provide answers.  Techniques chosen will ultimately depend on what type of artifact(s) one wishes to study.  This article outlines processes for analyzing different artifact classes and describes popular techniques used to analyze each class of artifact.  Keep in mind that archaeologists frequently alter or add techniques in the process of analysis as observations can alter original research questions. The Hammer of Thor is a 3.3 m tall, t-shaped, man-made rock formation, located along the Arnaud River in the Ungava Peninsula, Quebec, Canada.  It was discovered in 1964 by an archaeologist who thought it was erected by Vikings.  He named it "The Hammer of Thor", in reference to the hammer-wielding Thor of Norse culture.  Today some scholars believe that it is more likely to be an artifact of Inuit culture, an inuksuk or stone landmark. The London Hammer (also known as the "London Artifact") is a name given to a hammer made of iron and wood that was found in London, Texas in 1936.  Part of the hammer is embedded in a limy rock concretion, leading to it being regarded by some as an anomalous artifact, asking how an obviously man-made tool could come to be encased in a 400 million year old rock. Hammer Bro., also known as Hammer Brothers or Hammer Bros. (Japanese: ハンマーブロス , Hepburn: Hanmā Burosu ) is a recurring enemy in the "Mario" series of video games. Created by Japanese video game designer Shigeru Miyamoto, it is a subspecies of Koopa Troopa that walks upright and attacks by throwing hammer projectiles at the player character.  Different variations of the Hammer Bro., named after the type of projectile they throw, include Boomerang Bro., Fire Bro., Sledge Bro., Sumo Bro, and Ice Bro.  The Hammer Bro.  has appeared in nearly every "Super Mario" game since its first appearance in "Super Mario Bros.", also appearing in various animated and printed adaptations of the franchise. Perivale Park Athletics Track is an athletics track in Ealing, West London.  It is the home of Ealing, Southall and Middlesex Athletics Club and the West London Hammer School.
Answer: An out-of-place artifact (OOPArt)