The Market Vectors Unconventional Oil & Gas ETF (NYSEArca: FRAK) tries to reflect the Market Vectors Unconventional Oil & Gas Index, which follows companies extract coalbed methane, coal seam gas, shale oil, shale gas, tight natural gas, tight oil and tight sands. The ETF has an expense ratio of 0.54%. [Van Eck Readies Alternative Oil and Gas ETF]

FRAK has a 71.2% allocation in the U.S., 28.5% in Canada and 0.3% in Australia. The fund has 44 holdings and the top include Occidental Pete 8.2%, Canadian Natural Resources 7.4%, EOG Resources 7.1%, Devon Energy 6.2% and Williams Cos Inc 5.6%.

The recently launched Sustainable North American Oil Sands ETF (NYSEArca: SNDS) tries to reflect the performance of the Sustainable North American Oil Sands Index, which is comprised of Canadian- or U.S.-listed companies that explore, produce, refine, market, store, transport or provide services related to oil sands. The fund is the first to focus solely in relation to oil sands. SNDS has an expense ratio of 0.50%. [The First North American Oil Sands ETF]

SNDS has 32 holdings, which are evenly distributed. Top hodlings include BP Amoco PLC 3.4%, Enbridge 3.4%, Imperial Oil 3.3%, Husky Energy 3.3% and Nexen 3.2%.

For more information on the oil industry, visit our oil & gas exploration category.

Max Chen contributed to this article.