Archaeological resource means any material remains of human life or activities which are at least 100 years of age, and which are of archaeological interest.
(1) Of archaeological interest means capable of providing scientific or humanistic understandings of past human behavior, cultural adaptation, and related topics through the application of scientific or scholarly techniques such as controlled observation, contextual measurement, controlled collection, analysis, interpretation and explanation.
(2) Material remains means physical evidence of human habitation, occupation, use, or activity, including the site, location, or context in which such evidence is situated.
(3) The following classes of material remains (and illustrative examples), if they are at least 100 years of age, are of archaeological interest and shall be considered archaeological resources unless determined otherwise pursuant to paragraph (a)(4) or (5) of this section:
(i) Surface or subsurface structures, shelters, facilities, or features (including, but not limited to, domestic structures, storage structures, cooking structures, ceremonial structures, artificial mounds, earthworks, fortifications, canals, reservoirs, horticultural/agricultural gardens or fields, bedrock mortars or grinding surfaces, rock alignments, cairns, trails, borrow pits, cooking pits, refuse pits, burial pits or graves, hearths, kilns, post molds, wall trenches, middens);
(ii) Surface or subsurface artifact concentrations or scatters;
(iii) Whole or fragmentary tools, implements, containers, weapons and weapon projectiles, clothing, and ornaments (including, but not limited to, pottery and other ceramics, cordage, basketry and other weaving, bottles and other glassware, bone, ivory, shell, metal, wood, hide, feathers, pigments, and flaked, ground, or pecked stone);
(iv) By-products, waste products, or debris resulting from manufacture or use of human-made or natural materials;
(v) Organic waste (including, but not limited to, vegetal and animal remains, coprolites);
(vi) Human remains (including, but not limited to, bone, teeth, mummified flesh, burials, cremations);
(vii) Rock carvings, rock paintings, intaglios and other works of artistic or symbolic representation;
(viii) Rockshelters and caves or portions thereof containing any of the above material remains;
(ix) All portions of shipwrecks (including, but not limited to, armaments, apparel, tackle, cargo);
(x) Any portion or piece of any of the foregoing.
(4) The following material remains shall not be considered of archaeological interest, and shall not be considered to be archaeological resources for purposes of the Act and this part, unless found in a direct physical relationship with archaeological resources as defined in this section:
(i) Paleontological remains;
(ii) Coins, bullets, and unworked minerals and rocks.
(5) The Federal land manager may determine that certain material remains, in specified areas under the Federal land manager's jurisdiction, and under specified circumstances, are not or are no longer of archaeological interest and are not to be considered archaeological resources under this part. Any determination made pursuant to this subparagraph shall be documented. Such determination shall in no way affect the Federal land manager's obligations under other applicable laws or regulations.
(6) For the disposition following lawful removal or excavations of Native American human remains and “cultural items”, as defined by the Native American Graves Protection and Repatriation Act (NAGPRA; Pub. L. 101-601; 104 Stat. 3050; 25 U.S.C. 3001-13), the Federal land manager is referred to NAGPRA and its implementing regulations.