For production volumes, shortages, mapping, reserves, and market trends.
- USGS Mineral Commodity Summary 2025: Sand and Gravel (Construction) (Willett, 2025) — National production, demand, and market trends for construction sand and gravel.
- USGS Crushed Stone 2025 Report (Willett, 2025) — National crushed stone production and market conditions.
- USGS Mineral Industry Survey: Crushed Stone and Sand and Gravel in the First Quarter 2025 — Quarterly aggregates production and trend tracking.
- USGS Mineral Industry Surveys: Crushed Stone and Sand and Gravel in the Second Quarter 2025 — Follow-up quarterly production and regional comparisons.
- USGS Sand and Gravel Report 2020–2024 / Mineral Commodity Summaries 2025 — Recent sand and gravel statistics and availability constraints.
- Michigan Geological Survey Aggregate Mapping Grant: March 2024 Status Report — Michigan-specific resource mapping, 3D geology, and aggregate inventory development.
- MDOT Aggregate Source Inventory (2023) — Michigan list of active aggregate sources and quality information.
- USGS Sand and Gravel (Construction) Statistics 1902–2022 — Historical production and value data.
- USGS Aggregate Resource Availability in the Conterminous United States (Langer, 2011) — Explains why aggregate shortages occur despite geologic presence.
- Managing and Protecting Aggregate Resources (Langer, 2002) — Planning-oriented discussion of access, zoning, and long-term supply.
- Road Map to Mineral Supply (Herrington, 2013) — General mineral supply constraints, resource access, and market concentration.
- Natural Aggregates of the Conterminous United States (Langer, 1988) — Foundational geologic overview of where aggregate resources occur.
- USGS Materials in Use in U.S. Interstate Highways (Sullivan, 2006) — Quantifies infrastructure dependence on aggregates.
- Mineral Industry of Michigan: Annual Statistical Summary 1975 — Historical Michigan mineral economy reference.
- Active Mines and Mineral Plants in Michigan (USGS, pulled 2025) — Current statewide inventory of operating mines and plants.
- Sand and Sustainability: Finding New Solutions for Environmental Governance of Global Sand Resources (UNEP, 2019) — Good for framing supply pressure and governance limits.
- Sand, Rarer Than One Thinks (UNEP, 2014) — Early global synthesis on sand demand, scarcity, and extraction pressures.
- A Simple System Dynamics Model for Global Production Rate of Sand, Gravel, Crushed Rock and Stone (Sverdrup et al., 2017) — Long-term supply, demand, reserves, and price modeling.